SOAP stands for Subjective, Objective, Assessment and Plan. It is a format used by health care providers to document their interactions with patients.
Hence, options B and C are the correct answers.
The following are the purposes of writing a SOAP: To formulate a treatment plan (B)To create a document which can be shared with other health care providers to ensure continuity of care (C)
To formulate a treatment plan (B)To create a document which can be shared with other health care providers to ensure continuity of care (C)To provide a clear and concise documentation of the patient's medical history and current condition (A and C)To communicate effectively among health care providers (B and C)
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Describe the property of lipids that makes them a better energy source than proteins or carbohydrates. Refer to bond energy in your description.
Lipids are an excellent source of energy as they are the primary components of cellular membranes and carry out various functions in the human body. Lipids also have the highest energy density of all macronutrients and can generate more energy than carbohydrates or proteins per unit of weight.
Lipids are energy-dense due to the high number of carbon-hydrogen bonds that they contain. They also have lower levels of oxygen compared to carbohydrates and proteins, which means that they can generate more energy per molecule. The reason why lipids have more energy per molecule is that carbon-hydrogen bonds store more energy than oxygen-hydrogen bonds found in carbohydrates and proteins. As a result, when the body breaks down lipids, more energy is released than when carbohydrates and proteins are broken down.Lipids are also insoluble in water, and this property enables them to be stored in adipose tissues.
They can be broken down and released into the bloodstream to provide a long-lasting source of energy when there are no other energy sources available to the body. As a result, lipids can be stored for more extended periods and used by the body as an energy source when carbohydrates and proteins are not available.
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Journal Review for: Phylogeny of Gekko from the Northern Philippines, and Description of a New Species from Calayan Island DOI: 10.1670/08-207.1
In terms of the molecular data
1. What type of molecular data was used? Describe the characteristic of the gene region used and how did it contribute to the findings of the study.
2. What algorithms were used in the study and how were they presented? If more than 1 algorithm was used, compare and contrast the results of the algorithms.
In terms of the morphological data
3. Give a brief summary of the pertinent morphological characters that were used in the study. How where they presented?
4. Phylogenetic studies are usually supported by both morphological and molecular data. In the journal assigned, how was the collaboration of morphological and molecular data presented? Did it create conflict or was it able to provide sound inferences?
Separate vs. Combined Analysis
5. Identify the substitution model utilized in the paper.
6. In the phylogenetic tree provided identify the support value presented (PP or BS). Why does it have that particular support value?
7. Did the phylogenetic analysis utilize separate or combined data sets? Explain your answer.
1. The type of molecular data used in the paper “Phylogeny of Gekko from the Northern Philippines, and Description of a New Species from Calayan Island” is mitochondrial and nuclear genes. The molecular phylogenetic analysis was based on 3469 base pairs of two mitochondrial genes (12S and 16S rRNA) and one nuclear gene (c-mos).
Mitochondrial DNA is generally used in phylogenetic analysis because it is maternally inherited and has a high mutation rate. In contrast, nuclear DNA evolves at a slower rate and is biparentally inherited.
2. In this paper, the maximum parsimony (MP) and Bayesian inference (BI) algorithms were used. MP was presented as a strict consensus tree, and BI was presented as a majority rule consensus tree. MP is a tree-building algorithm that seeks to minimize the total number of evolutionary changes (such as substitutions, insertions, and deletions) required to explain the data. In contrast, BI is a statistical method that estimates the probability of each tree given the data. It is known to be a powerful tool for inferring phylogenies with complex evolutionary models. In this study, the two algorithms produced similar topologies, suggesting that the tree topology is robust.
3. The morphological data used in the study included the number of scales around the midbody, the presence of a preanal pore, the number of precloacal pores, and the length of the fourth toe. These morphological characters were presented as a table that shows the values for each species.
4. In this study, both molecular and morphological data were used to infer the phylogeny of the Gekko species. The phylogenetic tree was based on the combined data set of molecular and morphological data, which was presented as a majority rule consensus tree. The combined analysis provided sound inferences, and there was no conflict between the two datasets.
5. The substitution model utilized in the paper was GTR+I+G. This is a general time reversible model that incorporates the proportion of invariable sites and a gamma distribution of rates across sites.
6. In the phylogenetic tree provided, the support value presented is PP (posterior probability). This particular support value was used because Bayesian inference was used to construct the tree. PP values range from 0 to 1 and indicate the proportion of times that a particular clade is supported by the data.
7. The phylogenetic analysis utilized combined data sets. The authors explained that the combined analysis is a powerful tool that can increase the accuracy and resolution of phylogenetic trees, especially when the datasets are not in conflict with each other.
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Essay: Discuss the antiphospholipid syndrome under the following headings Clinical features , Pathophysiology and Laboratory testing
Antiphospholipid syndrome (APS) is an autoimmune disorder that is characterized by the presence of antiphospholipid antibodies that target phospholipids in the blood. This disorder is known to cause various clinical features such as thrombosis, recurrent miscarriages and thrombocytopenia. Additionally, it can be associated with other diseases such as systemic lupus erythematosus and HIV infection.
Clinical Features
The clinical presentation associated with antiphospholipid syndrome is highly variable and can include thrombosis, recurrent miscarriages, skin lesions, thrombocytopenia, venous and arterial thromboses, pulmonary emboli, stroke and cognitive decline. Additionally, patients may present with low platelet count, along with dilated scalp veins called livedo reticularis.
Pathophysiology
The pathophysiology of APS involves the production of an abnormally high number of antiphospholipid antibodies. These antibodies are targeted against phospholipids found on cell surfaces and in the membrane of the blood vessels. This leads to an increased risk of thrombosis due to a prothrombotic state, recurrent miscarriage due to a hypercoagulable state, and tissue injury due to an inflammation-induced damage.
Laboratory Testing
In order to diagnose APS, a detailed clinical history must be taken and laboratory tests should be done to measure the levels of antiphospholipid antibodies in the blood. The most commonly used tests for this purpose are Anticardiolipin antibodies (aCL) IgG and IgM, Lupus anticoagulant tests, and Beta-2-glycoprotein 1 IgG and IgM antibodies. A positive result obtained from any one of these tests suggests a diagnosis of APS.
In some insect species the males are haploid. What process (meiosis or mitosis) is used to produce gametes in these males?
Wiskott-Aldrich Syndrome (WAS) is an X-linked disorder characterized by low platelet counts, eczema, and recurrent infections that usually kill the child by mid childhood. A woman with one copy of the mutant gene has normal phenotype but a woman with two copies will have WAS. Select all that apply: WAS shows the following
Pleiotropy
Overdominance
Incomplete dominance
Dominance/Recessiveness
Epistasis
In some insect species, the males are haploid, and mitosis is used to produce gametes in these males. Wiskott-Aldrich Syndrome (WAS) shows Dominance/Recessiveness.
In some insect species, the males are haploid. Mitosis is used to produce gametes in these males. This is because mitosis is the type of cell division that occurs in somatic cells. It results in the production of two identical daughter cells with the same chromosome number as the parent cell. Meiosis, on the other hand, is the type of cell division that occurs in germ cells. It results in the production of four genetically diverse daughter cells with half the chromosome number of the parent cell.Therefore, mitosis is used to produce gametes in male haploid insect species.
.Wiskott-Aldrich Syndrome (WAS) shows the Dominance/Recessiveness. Dominant alleles are those that determine a phenotype in a heterozygous (Aa) or homozygous (AA) state. Recessive alleles determine a phenotype only when homozygous (aa). In the case of WAS, a woman with one copy of the mutant gene has a normal phenotype because the normal gene can mask the effect of the mutant gene. However, a woman with two copies of the mutant gene will have WAS because the mutant gene is now in a homozygous state. Therefore, the mutant allele is recessive to the normal allele.
In some insect species, the males are haploid, and mitosis is used to produce gametes in these males. Wiskott-Aldrich Syndrome (WAS) shows Dominance/Recessiveness.
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QUESTION 22 Which of these statements is false? Physical activity increases the risk of adverse events, Exercise-related injuries are preventable. Risk of sudden cardiac death is higher among habitually inactive people than among active people. Exercise increases the risk of sudden cardiac death ole Injury
The false statement among the following choices is Exercise increases the risk of sudden cardiac death. Sudden cardiac death is an unexpected loss of heart function, breathing, and consciousness caused by an electrical disturbance in the heart.
It happens unexpectedly and almost immediately, so the person can't get medical attention.Physical activity is very beneficial for the human body. Physical activity is related to a decreased risk of cardiovascular disease, diabetes, colon cancer, and breast cancer. Exercise-related injuries are preventable if people take appropriate precautions.Exercise-related injuries, such as ankle sprains, blisters, and muscle strains, can be avoided by wearing appropriate shoes and clothes, being aware of surroundings, warming up before exercise, and cooling down after exercise. It is essential to follow safety guidelines to avoid injuries or accidents.Inactive individuals have a higher risk of sudden cardiac death than active people. Habitually inactive individuals are at higher risk of heart disease than those who are active. Exercise decreases the risk of sudden cardiac death and heart disease.Exercise increases the strength of the heart and improves circulation, reducing the risk of heart disease and sudden cardiac death.
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Question 13 0.05 pts Which of the following mechanisms produces the MOST diversity in T cell receptors? imprecise joining of VDJ segments O having multiple V region segments from which to choose somatic hypermutation having multiple C region gene segments from which to choose Question 17 0.05 pts Which statement BEST DESCRIBES the function of the C3 component of complement? It forms part of a convertase on the bacteria and is recognized by neutrophils through the receptor CR1. It binds to antibody Fc that are bound to the surface of the bacteria. It initiates the end-stage of complement to form part of the Membrane Attack Complex (MAC). O It initiates the extrinsic pathway of coagulation
13. Imprecise joining of VDJ segments. The answer 1 is correct.
20. IgE and mast cells. The option 4 is correct.
17. It initiates the end-stage of complement to form part of the Membrane Attack Complex (MAC). The option 3 is correct.
Question 13: The mechanism that produces the MOST diversity in T cell receptors is the "imprecise joining of VDJ segments." This process involves the rearrangement of variable (V), diversity (D), and joining (J) gene segments during T cell development.
Question 20: An inflammatory response that occurs immediately upon exposure to antigen is MOST LIKELY to be mediated by "IgE and mast cells." IgE antibodies are specialized immunoglobulins that are involved in allergic and immediate hypersensitivity reactions.
Upon exposure to an antigen, IgE antibodies bind to mast cells, which are present in tissues throughout the body.
Question 17: The function of the C3 component of complement is BEST DESCRIBED by the statement "It initiates the end-stage of complement to form part of the Membrane Attack Complex (MAC)." The complement system is a part of the innate immune response and plays a crucial role in host defense against pathogens.
C3 is a central component of the complement cascade. Activation of C3 leads to the formation of C3 convertase, which cleaves C3 into C3a and C3b.
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What is the mechanism of action of contraceptive pills? Describe
they interfere the uterine and ovarian cycles. Include: how do they
prevent ovulation? Pls don't copy paste from other chegg answers, I
Contraceptive pills contain synthetic estrogen and progesterone hormones that prevent ovulation and also alter the cervical mucus and lining of the uterus.
Contraceptive pills are used to prevent pregnancy. It contains synthetic estrogen and progesterone hormones which interfere with the ovarian and uterine cycles in females. It prevents ovulation by inhibiting the production of follicle-stimulating hormone (FSH) and luteinizing hormone (LH), which are responsible for the growth and maturation of follicles in the ovary. By doing so, the ovary does not release an egg, and therefore fertilization does not occur. Also, contraceptive pills thicken the cervical mucus, which makes it difficult for sperm to enter the uterus. If by chance the egg is released, the pills also alter the lining of the uterus, which makes it less receptive to the fertilized egg. Thus, the egg is not implanted, and pregnancy is avoided.Contraceptive pills contain synthetic estrogen and progesterone hormones that prevent ovulation and also alter the cervical mucus and lining of the uterus.
Contraceptive pills are highly effective in preventing pregnancy when taken correctly. It is essential to take them at the same time every day to ensure maximum protection. However, they do not protect against sexually transmitted infections (STIs).
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STATION 3 - SALTATORIAL VERTEBRATES (kangaroos, kangaroo rats,
gerbils, jerboas, tarsiers, frogs)
3e. How has the trunk of frogs become shorter (1 mark)? What is
the adaptive advantage?
3b. What is th
STATION 3 - SALTATORIAL VERTEBRATES (kangaroos, kangaroo rats, gerbils, jerboas, tarsiers, frogs)3e. The trunk of frogs has become shorter in order to achieve a more advanced way of jumping.
The shorter trunk increases the efficiency of the jump, as it makes the body more compact, and lessens the weight of the hind legs as the frog moves in the air. The shorter trunk of the frog also provides an advantage by enabling it to move easily and smoothly through the water, as the decreased drag allows it to swim faster.
Saltatorial is a type of locomotion that involves hopping or jumping, and it is one of the most energy-efficient ways of getting around for the animals that use it. The kangaroo rat is one of the most notable examples of a saltatorial vertebrate, and it has evolved a number of adaptations to suit its jumping lifestyle.
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Discuss the role of the autonomic nervous system in controlling the body’s
functions.Your response should discuss both the sympathetic and the
parasympathetic divisions. Your response sho
The autonomic nervous system (ANS) plays a crucial role in controlling the body's functions and maintaining homeostasis. It consists of two main divisions: the sympathetic and the parasympathetic nervous systems.
The sympathetic division of the ANS is responsible for the body's "fight-or-flight" response during stressful or emergency situations. When activated, it prepares the body for intense physical activity or response to a threat. The sympathetic division increases heart rate, dilates the airways, stimulates the release of stress hormones like adrenaline, and redirects blood flow to vital organs and skeletal muscles. This division helps mobilize energy resources, enhances alertness, and heightens overall physical performance.
On the other hand, the parasympathetic division is responsible for the body's "rest-and-digest" response. It promotes relaxation, conserves energy, and supports normal bodily functions during non-stressful situations. The parasympathetic division decreases heart rate, constricts the airways, stimulates digestion, and promotes nutrient absorption. It also helps maintain normal blood pressure, supports sexual arousal, and aids in the elimination of waste materials.
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what is virus host interaction ? i dont find clear info. i have assingment ant i dont know what i write please helppppp
Virus-host interaction refers to the relationship and interactions between a virus and its host organism. It involves the complex interplay between the virus and the host's cells, tissues, and immune system.
During virus-host interaction, viruses infect host cells and hijack their cellular machinery to replicate and produce new virus particles. The virus enters the host's cells, releases its genetic material (DNA or RNA), and takes control of the cellular processes to produce viral proteins and replicate its genetic material.
This can lead to various consequences for the host, ranging from mild symptoms to severe diseases.
The host organism's immune system plays a crucial role in the virus-host interaction. It detects the presence of viruses and mounts an immune response to eliminate the infection.
The interaction between the virus and the host's immune system can result in a dynamic battle, with the virus trying to evade the immune response and the immune system attempting to control and eliminate the virus.
The outcome of virus-host interaction can vary depending on factors such as the virulence of the virus, the host's immune response, and the specific mechanisms employed by the virus to evade or manipulate the host's defenses.
Understanding virus-host interactions is essential for developing strategies to prevent and control viral infections.
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A molecule that blocks the activity of carbonic anhydrase
would?
A. decrease the amount oh H+ in the blood
B. interfere with oxygen binding to hemoglobin
C. cause an decrease in blood pH
D. increase t
when plasma concentration of a substance exceeds its renal concentration, more of the substance will be? A. none of these answers are correct B. reabsorbed C. filtered D. secreted the kidneys transfer
A. decrease the amount of H+ in the blood. Carbonic anhydrase is an enzyme that plays a crucial role in the formation of carbonic acid (H2CO3) from carbon dioxide (CO2) and water (H2O) in red blood cells. Carbonic acid then dissociates into bicarbonate ions (HCO3-) and hydrogen ions (H+).
This process is essential for maintaining acid-base balance in the body.
By blocking the activity of carbonic anhydrase, the conversion of CO2 into carbonic acid and subsequently into HCO3- and H+ is inhibited. As a result, there would be a decrease in the amount of H+ ions produced. This would lead to a decrease in blood acidity and contribute to an increase in blood pH.
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rDNA O when 2 different DNA from two different species are joined together
O example human insulin gene placed in a bacterial cell O DNA is copied along with bacterial DNA O Proteins are then made known as recombinant proteins. O All of the above •
All of the statements mentioned about DNA and recombinant DNA are correct.
The correct answer is: All of the above.
What occurs in the DNA combination?When two different DNA from two different species are joined together, several processes occur:
The human insulin gene, for example, can be placed in a bacterial cell. This is achieved through genetic engineering techniques such as gene cloning or recombinant DNA technology.
The DNA containing the human insulin gene is copied along with the bacterial DNA through DNA replication. This ensures that the foreign DNA is replicated along with the host DNA during cell division.
Once the recombinant DNA is present in the bacterial cell, the cell's machinery translates the genetic information into proteins. In the case of the human insulin gene, the bacterial cell will produce insulin proteins using the instructions provided by the inserted gene. These proteins are known as recombinant proteins.
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Which integument layer has the greatest capacity to retain fluid
?
The integumentary system is composed of the skin, hair, nails, and glands. Its main function is to protect the body from damage and external elements. The skin is the largest organ in the body, and it is composed of three layers: the epidermis, dermis, and subcutaneous layer.
The epidermis is the outermost layer of the skin and is composed of dead cells that are constantly being shed. The dermis is the middle layer of the skin and is composed of connective tissue, blood vessels, and nerves. The subcutaneous layer is the innermost layer of the skin and is composed of fat, connective tissue, and blood vessels.The subcutaneous layer has the greatest capacity to retain fluid. This layer is made up of adipose tissue, which is composed of fat cells. These fat cells can absorb and store large amounts of fluid. This helps to protect the body from dehydration and helps to regulate body temperature.In addition to its role in fluid retention, the subcutaneous layer also provides insulation and protection for the body.
Overall, the integumentary system plays an essential role in protecting the body and maintaining homeostasis.
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For many medical conditions, adult stem cells are not suitable for treatment so researchers aim to use embryonic stem cells. Compare and contrast the advantages and disadvantages of both adult and embryonic stem cells in cell- based regenerative therapies. Your answer should demonstrate a detailed knowledge of both embryonic and adult stem cell sources, their isolation and characterisation. Your answer should also address the potential ethical and political issues related to stem cell research. (10 marks)
Embroynic and adult stem cells both have advantages and disadvantages in the cell-based regenerative therapies.
Below are some of the comparisons and contrasts:
Embryonic stem cells :Embryonic stem cells are derived from the inner cell mass of blastocysts that have been fertilized by in vitro fertilization (IVF) procedures or cloned by somatic cell nuclear transfer (SCNT).
Advantages: Embryonic stem cells have a high potential to differentiate into any type of cells in the human body and they can divide indefinitely, therefore, can be used to develop any type of cell to regenerate tissues for therapeutic use.
Disadvantages: One of the major disadvantages of embryonic stem cells is their potential to form tumors when transplanted in the human body. They require the administration of immunosuppressive drugs to reduce the risk of rejection. Adult stem cells are present in various organs, tissues, and blood of the human body. They can be isolated from bone marrow, blood, adipose tissue, and other organs.
Advantages: Adult stem cells are present in an already developed organ so they do not require the destruction of an embryo, hence there are no ethical issues involved in their usage. They can be obtained from the patient's own body, therefore, there are no issues of immune rejection. They also have a low risk of tumor formation when used for therapeutic purposes.
Disadvantages: Adult stem cells have limited differentiation potential. they can differentiate only into a limited number of cell types. Also, the number of adult stem cells in the human body decreases with age, which can limit their potential to be used in regenerative therapies. The ethical and political issues relating to stem cell research are complex and require a careful consideration of the interests of patients, scientists, and society as a whole.
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If excess metabolic fuel is taken in over time, metabolic fuel is stored for the long term. In what form(s) is metabolic fuel stored for the long term? What tissue(s) is it stored in? And how is this storage impacted by the form(s) in which the excess metabolic fuel is taken in as?
When excess metabolic fuel is taken in over time, metabolic fuel is stored for the long term in adipose tissue. Adipose tissue is the primary site of storage for metabolic fuel in the body. The fuel is stored in the form of triglycerides (i.e., three fatty acids attached to a glycerol molecule).
Excess metabolic fuel is taken in when energy intake exceeds energy expenditure. This excess fuel is converted to fat and stored in adipose tissue for the long term. Adipose tissue is present throughout the body and serves as an energy reserve for times of low energy availability.
The form(s) in which the excess metabolic fuel is taken in can impact this storage in various ways. For example, if the excess fuel is taken in the form of carbohydrates, the body will first store this excess glucose in the liver and muscles in the form of glycogen.
However, once these storage sites are full, the excess glucose is converted to fat and stored in adipose tissue. If the excess fuel is taken in the form of dietary fat, the body can readily store this fat directly in adipose tissue without first converting it to another form.
However, it's worth noting that the types of dietary fat consumed can impact the storage and metabolism of this fuel. For example, saturated and trans fats tend to be more readily stored as fat in adipose tissue than unsaturated fats.
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Describe how mutations in oncogenes can induce genome instability, and contrast with genome instability induced by mutations in tumour suppressor genes.
Mutations in oncogenes and tumor suppressor genes can cause genomic instability, leading to the development of cancer. Mutations in oncogenes and tumor suppressor genes can lead to genome instability by affecting cellular pathways responsible for DNA damage repair, cell cycle control, and apoptosis.
Mutations in oncogenes and tumor suppressor genes can cause genomic instability, leading to the development of cancer. Mutations in oncogenes and tumor suppressor genes can lead to genome instability by affecting cellular pathways responsible for DNA damage repair, cell cycle control, and apoptosis. Mutations in oncogenes are genes that are capable of initiating the development of cancer in normal cells. Their mutations increase the activity of a protein encoded by the oncogene, leading to an uncontrolled cell growth and division, which can lead to cancer. However, when mutated, oncogenes can also activate DNA damage repair mechanisms that cause genomic instability, such as DNA replication and cell division that can lead to gene amplification and gene rearrangements.
On the other hand, tumor suppressor genes act to prevent the development of cancer by regulating cell proliferation, DNA repair, and apoptosis. Their mutations, on the other hand, lead to genomic instability, which can cause the loss of critical genes, uncontrolled cell growth, and the development of cancer. When tumor suppressor genes are mutated, they fail to control the cellular mechanisms responsible for DNA damage repair, cell cycle control, and apoptosis, which can cause genomic instability and the development of cancer.
Therefore, mutations in oncogenes can induce genomic instability by affecting cellular pathways that regulate DNA repair, cell cycle control, and apoptosis, while mutations in tumor suppressor genes can induce genomic instability by disrupting the same cellular pathways responsible for the regulation of DNA repair, cell cycle control, and apoptosis.
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One way of identifying a drug target in a complex cellular extract is to use an affinity approach, i.e. fix the drug to a resin (agarose etc) and use it to "pull down "" the target from the extract. What potential problems do you think may be encountered with attempting this approach?
One way of identifying a drug target in a complex cellular extract is by using an affinity approach which involves fixing the drug to a resin such as agarose. The target is then "pulled down" from the extract.
However, this approach may encounter some potential problems such as:
Non-specific binding: The drug resin could bind to other molecules that are unrelated to the target protein, leading to inaccurate results.Difficulty in obtaining a pure sample: Even though the target molecule could bind to the drug resin, other proteins and molecules can also bind which makes it challenging to obtain a pure sample.Low Abundance Targets: In a complex cellular extract, the target molecule may exist in low abundance and the signal might not be strong enough to detect, making it difficult to pull down.Biochemical Incompatibility: The drug and the resin may not be compatible with the target, thus it may not bind or bind weakly which means the target protein might not be able to be pulled down.Therefore, while the affinity approach is a very useful and important method for drug target identification, it also has its limitations and potential problems that need to be considered.
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1.
Statement 1: Dendritic cells are phagocytes with professional antigen-presenting properties.
Statement 2: Neutrophils circulate as part of the blood and act as surveillance to detect presence of pathogens.
A) Statement 1 is true. Statement 2 is false.
B) Statement 2 is true. Statement 1 is false.
C) Both statements are true.
D) Both statements are false.
2. Histamine is a signaling molecule that plays a significant role in regulating immune responses such as during allergic reactions and inflammation. It causes blood vessels to dilate and become more permeable so that white blood cells can immediately reach the site of injury, damage, or infection. What types of white blood cells can release histamine?
A) basophils and mast cells
B) B cells and T cells
C) dendritic cells
D) neutrophils
3. What molecules are released by activated helper T cells?
A) immunoglobulins
B) antigen
C) cytokines
D) histamine
1. The correct answer is A) Statement 1 is true. Statement 2 is false. Dendritic cells are indeed phagocytes with professional antigen-presenting properties,
Whereas neutrophils are primarily known for their role in phagocytosis and are not considered professional antigen-presenting cells.
2. The correct answer is A) basophils and mast cells. Basophils and mast cells are types of white blood cells that can release histamine. Histamine release by these cells is associated with allergic reactions and inflammation.
3. The correct answer is C) cytokines. Activated helper T cells release cytokines, which are signaling molecules that play a critical role in coordinating and regulating immune responses.
Immunoglobulins are antibodies produced by B cells, while antigen is the target of an immune response. Histamine is released by basophils and mast cells, as mentioned in the previous question.
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2. Explain why ampicillin acts as an functions in bacteria. antibiotic, and the mechanism whereby the ampi gene [2]
Ampicillin is an antibiotic that acts by inhibiting bacterial cell wall synthesis. It belongs to the class of antibiotics called penicillins and specifically targets the enzymes involved in the construction of the bacterial cell wall.
The mechanism of action of ampicillin involves interfering with the transpeptidation step of peptidoglycan synthesis. Peptidoglycan is a crucial component of the bacterial cell wall responsible for maintaining its structural integrity. It consists of alternating units of N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM), cross-linked by short peptide chains. Ampicillin works by binding to and inhibiting the transpeptidase enzymes known as penicillin-binding proteins (PBPs). These enzymes are responsible for catalyzing the cross-linking of the peptide chains in peptidoglycan. In summary, ampicillin acts as an antibiotic by inhibiting bacterial cell wall synthesis through the inhibition of transpeptidase enzymes.
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Explain how meiosis and sexual reproduction generate
biodiversity. Discuss the advantage(s) and disadvantage(s) of
sexual reproduction in the light of evolution.
Meiosis and sexual reproduction help to generate diversity in organisms. Sexual reproduction occurs when two individuals from different sexes come together and produce offspring that inherit traits from both parents. Here are the advantages and disadvantages of sexual reproduction in the light of evolution:Advantages of sexual reproduction: Sexual reproduction allows for variation among offspring which is useful in unpredictable environments.
It is possible for a genetic mutation to be beneficial, and sexual reproduction is a means of allowing such mutations to be propagated. Sexual reproduction also allows for the exchange of genetic material between organisms, which can increase genetic diversity and help adaptability.Disadvantages of sexual reproduction: Sexual reproduction can be time-consuming and resource-intensive. It requires the finding of a mate and the production of gametes which can be expensive.
There is also a risk of producing offspring that are not viable, which can be costly to the organism. Another disadvantage is that sexual reproduction results in the breaking up of successful genetic combinations, which can be disadvantageous in some situations. In conclusion, while there are both advantages and disadvantages to sexual reproduction, the ability to generate genetic diversity is crucial to the long-term survival of species.
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Which statement is false about respiratory tract infections? a. Pneumonia immunisations must be repeated every year b. Influenza can lead to pneumonia c. Rhinosinusitis can be caused by both bacteria and viruses d. The common cold can be caused by parainfluenza viruses e. Immunisation does not provide complete protection against influenza
The false statement about respiratory tract infections is:
a. Pneumonia immunisations must be repeated every year.
Pneumonia immunizations do not need to be repeated every year. Once vaccinated against pneumonia, the immunity provided by the vaccine can last for several years or even a lifetime, depending on the specific vaccine and individual factors. It is not necessary to repeat pneumonia immunizations annually, unlike influenza vaccinations that require annual updates due to the evolving nature of the influenza virus.
The other statements are true:
b. Influenza can lead to pneumonia. Influenza infection can cause complications such as pneumonia, particularly in individuals with weakened immune systems or underlying health conditions.
c. Rhinosinusitis can be caused by both bacteria and viruses. Rhinosinusitis, inflammation of the nasal passages and sinuses, can be caused by both bacterial and viral infections. The majority of cases are viral in nature, but bacterial infections can also occur.
d. The common cold can be caused by parainfluenza viruses. Parainfluenza viruses are one of the many viruses that can cause the common cold, along with rhinoviruses and other respiratory viruses.
e. Immunization does not provide complete protection against influenza. While influenza immunization can significantly reduce the risk of contracting the flu and its complications, it does not offer 100% protection. The effectiveness of the vaccine can vary depending on factors such as the match between the vaccine strains and circulating strains, individual immune response, and other variables. However, immunization remains an important preventive measure to reduce the severity and spread of influenza.
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GEFEL I 8 EE E C The structure shown in this image represents which part of a cell? Integral protein Integral protein Endoplasmic membrane Questions Filter (10) Y Pore Channel Polar head (hydrophilic)
The structure shown in this image below represents the Plasma membrane.
What is the plasma membrane?Plasma membrane is the outer membrane of a cell. It is a phospholipid bilayer that separates the cell from its environment.
The plasma membrane is responsible for regulating the movement of substances into and out of the cell. It also plays a role in cell signaling and cell adhesion.
Integral proteins are proteins that are embedded in the membrane of a cell. They can be either transmembrane proteins, which extend all the way through the membrane, or peripheral proteins, which are attached to the surface of the membrane.
The above answer is based on the full question below;
The structure shown in this image represents which part of a cell? Pore Channel Integral protein Integral protein Polar head hydrophilic Fatty acid tal (hydrophobic)
A Nucleus
B) Lysosomes
C) Plasma membrane
D) Endoplasmic membrane
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Pedigrees and Mendelian inheritance
In Labrador retrievers, coat color is controlled by two genes, one that determines whether pigment is deposited in the hair and one that controls the color of the pigment. The first gene has two alleles, one for black pigment and one for brown (chocolate) pigment. The black allele is dominant. The alleles at the second gene determine if the pigment is deposited in the fur of the animal. If the dog has two recessive alleles at this locus, no pigment will be deposited in the fur and the dog will be a yellow lab. If the dog has at least one dominant allele at this locus and at least one black pigment allele, they will be a black lab. If the dog has two brown alleles and at least one dominant allele at the second locus, they will be a chocolate lab.
Take a deep breath. You’ve got this. The information you have in the problem is:
The structure of the pedigree through the naming of individuals (the pedigree is already drawn for you)
How the inheritance of coat color works in Labrador retrievers
The phenotype of the individuals in the pedigree
The steps you need to take to solve it:
Assign phenotypes to every dog Figure out the genotype for the color deposition locus – use D/d to indicate whether the color is deposited/not deposited
Figure out the genotype for the pigment locus – use B/b to indicate Black allele/brown allele
Using the pedigree below, fill in the genotypes and phenotypes in the table following the pedigree for the family of Labrador retrievers. Mom and Dad are indicated for you. If a genotype is indeterminate, use a dash (-). Once you have done that, use that information to answer the questions below.
Family: Leia, the mom, is a black lab. Han, the dad, is a brown lab. Leia’s father is a black lab, and her mother is a black lab, both heterozygous for the color deposition locus and the pigmentation locus. Han’s father is a yellow lab from a homozygous black father and brown mother. Han’s mother is a brown lab from two brown labs that are homozygous for the color deposition gene. Leia and Han have three puppies: one female brown lab named Jaina, one male black lab called Jacen, and one male yellow lab named Ben.
Phenotypes of all the dogs were identified and genotypes of the color deposition locus and pigmentation locus of each dog were assigned. With the help of this information, the genotypes and phenotypes of Leia and Han’s puppies were found.
Phenotypes of all the dogs were identified and genotypes of the color deposition locus and pigmentation locus of each dog were assigned. In the color deposition locus, D/d was used to indicate whether the color is deposited/not deposited. In the pigmentation locus, B/b was used to indicate Black allele/brown allele. With the help of this information, the genotypes and phenotypes of Leia and Han’s puppies were found. The genotypes and phenotypes of the puppies are as follows:Jaina, the female brown lab: bbD/-Jacen, the male black lab: BbD/-Ben, the male yellow lab: bbdd.
Therefore, the conclusions that can be drawn from the given information are that Leia and Han are heterozygous for the color deposition and pigmentation locus. Their puppies have different genotypes and phenotypes for the color deposition and pigmentation locus. The brown puppy has the genotype bbD/-, black puppy has BbD/-, and the yellow puppy has the genotype bbdd.
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Transmembrane movement of a substance down a concentration gradient with no involvement of membrane protein a.belongs to passive transport
b. is called facilitated diffusion c.belongs to active transport d.is called simple diffusion
Transmembrane movement of a substance down a concentration gradient with no involvement of membrane protein is called simple diffusion. Simple diffusion is a type of passive transport that occurs without the involvement of membrane proteins.
Passive transport, also known as passive diffusion, does not require energy input from the cell, and substances move down their concentration gradient. It includes simple diffusion and facilitated diffusion.In simple diffusion, molecules move directly through the lipid bilayer of the plasma membrane from high concentration to low concentration. Small molecules such as oxygen, carbon dioxide, and water can move across the membrane through simple diffusion. Facilitated diffusion, on the other hand, requires the involvement of membrane proteins to transport molecules across the membrane.
The membrane protein creates a channel or a carrier for the solute to cross the membrane, but the movement still goes down the concentration gradient.The movement of molecules in active transport is opposite to that of passive transport, moving from an area of low concentration to an area of high concentration. Active transport requires the use of energy, usually in the form of ATP, to pump molecules across the membrane against the concentration gradient. Therefore, we can conclude that the correct option is d. is called simple diffusion.
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Chi square test. A cross is made to study the following in the Drosophila fly: black body color (b) and vermilion eye color (v). A heterozygous red-eyed, black-bodied female was crossed with a red-eyed, heterozygous male for cream body color. From the crossing the following progeny was obtained in the filial generation 1 (F1):
F1 Generation:
130 females red eyes and cream colored body
125 females red eyes and black body
70 males red eyes and cream body
55 males red eyes and black body
60 males vermilion eyes and cream body
65 males vermilion eyes and black body
The statistical test hypothesis would be that there is no difference between the observed and expected phenotypic frequencies.
a) Using the information provided, how is eye color characteristic inherited? why?
b) How is the characteristic of skin color inherited?
a. Eye color is inherited as sex-linked inheritance, with vermilion eye color being a sex-linked trait.
b. Skin color is inherited through autosomal inheritance, with black and cream body coloration being determined by alleles on autosomal chromosomes.
a. Eye color characteristic in the Drosophila flies is inherited as sex-linked inheritance. In this case, vermilion eye color is a sex-linked trait, with the genes that determine eye color located on the X chromosome. Males only have one X chromosome, so if they receive the X-linked allele for vermilion eye color from their mother, they will express that trait.
This is because they lack a second X chromosome to mask the expression of the allele. On the other hand, females have two X chromosomes and can inherit two alleles, one from each parent. If a female receives even one copy of the vermilion allele, she will express that trait.
b. The characteristic of skin color, specifically body color, in the Drosophila flies is inherited through autosomal inheritance. In this case, black body color is a recessive trait, while cream body color is dominant. Both black and cream body coloration requires the presence of the respective allele on the two homologous autosomal chromosomes.
In the given cross, both the male and female flies are heterozygous for the genes that determine skin color. This indicates that the trait for body color is inherited through autosomal inheritance, where the presence of the dominant allele (cream body color) masks the expression of the recessive allele (black body color).
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Submit your answer to this question in order to open week 5 lessons page. Complete the table: Cellular location Cellular location Uses Main products produced at the Process in prokaryotic in eukaryotic oxygen cells cells end Glycolysis Intermediate step (prep for Krebs cycle) Krebs cycle Aerobic electron transport chain
The table compares the cellular locations, uses, and main products produced at various stages of cellular respiration in prokaryotic and eukaryotic cells.
In prokaryotic cells, glycolysis occurs in the cytoplasm, where glucose is converted into pyruvate, producing a small amount of ATP and NADH. The intermediate step, also known as the preparatory step for the Krebs cycle, takes place in the cytoplasm as well, where pyruvate is converted into acetyl-CoA.
In eukaryotic cells, glycolysis also occurs in the cytoplasm, generating ATP and NADH from glucose. However, the intermediate step takes place in the mitochondria, where pyruvate is transported and converted into acetyl-CoA.
The Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid cycle (TCA cycle), takes place in the mitochondrial matrix of both prokaryotic and eukaryotic cells. It generates high-energy molecules such as NADH, FADH2, and ATP through a series of enzymatic reactions.
The aerobic electron transport chain, which is the final stage of cellular respiration, occurs in the inner mitochondrial membrane of eukaryotic cells and the plasma membrane of prokaryotic cells. It involves the transfer of electrons from NADH and FADH2 to oxygen, generating a large amount of ATP through oxidative phosphorylation.
Overall, cellular respiration is a crucial metabolic process in both prokaryotic and eukaryotic cells, enabling the production of ATP and the efficient utilization of energy from glucose in the presence of oxygen.
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Elongation continues in translation until a STOP codon is reached on the mRNA. a) True b) False
a) True.
During translation, elongation refers to the process of adding amino acids to the growing polypeptide chain. It continues until a STOP codon is encountered on the .
The presence of a STOP codon signals the termination of protein synthesis and the release of the completed polypeptide chain from the ribosome.
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1 pts Arrange the following correct sequence of events during exhalation: 1. Air (gases) flows out of lungs down its pressure gradient until intrapulmonary pressure is 0 (equal to atmospheric pressure
Air flows out of the lungs during bin the following correct sequence of events:
1. Contraction of the diaphragm and external intercostal muscles reduces intrapleural pressure.
2. Decreased intrapleural pressure causes the lungs to recoil, compressing the air within the alveoli.
3. The compressed air flows out of the lungs down its pressure gradient until intrapulmonary pressure is 0, equal to atmospheric pressure.
During exhalation, the primary muscles involved are the diaphragm and the external intercostal muscles. These muscles contract, causing the volume of the thoracic cavity to decrease. As a result, the intrapleural pressure within the pleural cavity decreases. The decreased intrapleural pressure leads to the recoil of the elastic lung tissue, which compresses the air within the alveoli.
As the volume of the thoracic cavity decreases, the pressure within the alveoli increases. This increased pressure creates a pressure gradient between the lungs and the atmosphere. The air naturally flows from an area of higher pressure (within the lungs) to an area of lower pressure (outside the body) until the pressures equalize. This process continues until the intrapulmonary pressure reaches 0, which is equal to atmospheric pressure.
Overall, the sequence of events during exhalation involves the contraction of the diaphragm and external intercostal muscles, the recoil of the lungs, and the resulting flow of air out of the lungs down its pressure gradient until the intrapulmonary pressure matches the atmospheric pressure.
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Microtubules are «dynamically unstable».
What is dynamic instability, and what does this mean for the function of the microtubules?
Explain the mechanism behind this process.
Microtubules are the largest elements of the cytoskeleton, which are composed of protein polymers that are intrinsically polar and assembled by the regulated polymerization of α- and β-tubulin heterodimers.
Microtubules are highly dynamic, which means that they are continuously being generated and broken down. This process is referred to as dynamic instability.
Dynamic instability is a mechanism that explains the dynamic behaviour of microtubules. The term dynamic instability is a description of the way in which microtubules change shape over time.
It means that microtubules are constantly shifting and changing shape, breaking down and reforming in a process that is dependent on the activity of the microtubule network.
Microtubules are able to undergo dynamic instability because of their unique composition. Each microtubule is made up of multiple tubulin subunits that are arranged in a spiral pattern.
This arrangement creates a structure that is both strong and flexible, allowing the microtubules to bend and twist in response to changes in the cell environment.
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The two strands of a DNA molecule are held together by what type of bonds?
a. carbon
b. hydrogen
c. nitrogen
d. none of the above
The correct answer is b. hydrogen bonds. The DNA molecule consists of two strands that are twisted around each other in a double helix structure.
The hydrogen bonds are formed between the nitrogenous bases of the nucleotides. The nitrogenous bases in DNA include adenine (A), thymine (T), cytosine (C), and guanine (G). Adenine forms three hydrogen bonds with thymine, and cytosine forms two hydrogen bonds with guanine.
Specifically, adenine and thymine are connected by two hydrogen bonds, while cytosine and guanine are connected by three hydrogen bonds. It is important to note that the backbone of the DNA molecule is formed by sugar-phosphate bonds, which run along the outside of the double helix structure and provide structural support.
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