Answer:
1. Oxygen moves through the plasma membrane by simple diffusion, as oxygen will be utilized fast for cell metabolism that will result in the concentration of oxygen inside a cell will always be less
2. Although the concentration of glucose is more outside a cell it cannot cross the plasma membrane by simple diffusion and crosses the plasma membrane by facilitated diffusion as glucose is a large and more polar molecule. A carrier protein called glucose transporter helps in this movement.
3. Water crosses the plasma membrane by simple diffusion as it has a small size.
4. Na+ ions are charged ions and cannot pass the plasma membrane by simple diffusion and they are carried in with the help of sodium pumps that are made up of certain membrane proteins by facilitated diffusion.
5. Cholesterol crossed the plasma membrane by facilitated diffusion as it is a non polar molecule and is diffused through channels.
In snapdragons pink-flowered plants (RW) are produced when red-flowered (RR) plants are crossed with white-flowered (WW) plants. This type of inheritance can best be described as:
Explain what the impact of mutations in myosin that disrupt ATP binding would have on the power stroke during muscle contraction. and hydrolysis Skeletal muscle arrangement, ATP binding and correct muscle contractions
Answer:
These cells will be atrophied because muscle contractions can't occur.
Explanation:
In muscle cells, ATP binding causes a conformational change in the structure of myosin, thereby these filaments move to a high-energy configuration. The muscle contraction is caused when this high energy state is amplified in the actin filaments that bind to myosin, in a process dependent on the ATP hydrolysis. The myosin-actin cycle is repeated by binding another ATP molecule on the myosin head, producing the contraction of muscle cells.
12. Researchers have spent decades and several millions of dollars studying diabetes among the Pima and Tohono O’odham tribes. Why hasn’t their research yielded a genetic explanation for the high rates of the disease?
Answer:
A link between cardiometabolic risk factors and race and ethnicity have been studied. It has been found that the rates of cardiometabolic risk factors are higher among ethnic minority populations such as African Americans, Hispanic Americans, and Native Americans.
Which would make for a weak claim?
1. a blog cited as the source
2. a large sample size
3. clear variables and controls
4. multiple trials
Answer:
A blog cited as a source
Explanation:
Blogs often contain opinions rather than facts
Which would make for a weak claim?
1. a blog cited as the source
2. a large sample size
3. clear variables and controls
4. multiple trials
Given the behavior and ecology of this insect, what are some factors that could cause the incidence of Chagas disease to increase in Central and South America in areas like the banana plantation, and why
Answer and Explanation:
There are many physical elements such as temperature, precipitation, humidity, altitude, vegetation, among others, that influence the presence of the insects that transmit the Chagas diseases. Its transmission seems to be enhanced by other social elements, such as the deficiency in basic services, lack of planning, the socio-economical conditions, cultural conditions. Altogether, these factors intervene in the presence of the Chagas disease, a systemic infection caused by the protozoa Trypanosoma cruzi. This protozoan is hosted by different wild and domestic mammals, transmitted to the human by hematophagous insects. The transmission occurs through dejections deposited on skin or mucose during or after the feeding process.
Different rural areas in Central and South America are characterized by a mountain relief (temperatures between 15 and 30ºC - relative humidity between 50 and 90%), as well as by a plane relief associated with alluvial plain (temperature between 20 and 35ºC - media relative humidity of 75%). Vegetation in the mountain area provides a natural habitat to the triatomines, the insects that transmit the Chagas disease.
Constant deforestation in mountains, soil move, the cutting down, firing, have destroyed the natural habitat of the insects, becomming the cause of their arrival to populated centers. As their environment is destroyed, insects migrate to new areas and find refuge in precarious houses that surround the affected areas. Most of these houses have clay walls, a roof made of branches, and no floor. People that live in these conditions do not have economic resources. Indexes of infestation in these houses are high due to the material used for their construction. Insects tend to establish near a source of food, such as domestic animals or even humans. It is also common that these houses have chicken coops and farmyards that also offer good conditions for the insects to live in.
Economic activities are important variables to consider, as these define the way of living in a population.
Agriculture activities are performed with no control or planning. People deforest to plant, getting in contact with the insects' natural habitat, producing environmental changes, and getting in touch with them, enhancing the risks of being infected and of transportin the insects.
Calcium blood levels are very tightly regulated with the aid of parathyroid hormone and vitamin D. The statements below represent actions that take place during times of low blood calcium, times of high blood calcium, or neither. Match below mention statements with them.
a. Increased vitamin D activation leads to decreased calcium absorption from the intestines.
b. Increased production Of PTH stimulates activation of vitamin D.
c. Parathyroid glands increase secretion of PTH.
d. Less calcium is reabsorbed by the kidneys.
e. Parathyroid glands decrease secretion of PTH.
f. Osteoclasts are inhibited. leading to decreased breakdown of bone.
g. PTH and vitamin D Stimulate increased breakdown of bore.
The kidneys absorb the functions that occur when the blood calcium level is low, when the blood calcium level is high or not less.
What are the functions of calcium?Calcium is the mineral most associated with healthy bones and teeth, although it also plays an important role in blood clotting, helps muscles contract, and regulates normal heart rhythm and nerve function.
Calcium is needed to build and maintain healthy bones and teeth. Among other roles, it can help control blood pressure. It is best to get enough calcium from foods such as dairy products, green leafy vegetables and tofu.
People usually take calcium by mouth to treat and prevent low calcium levels, muscle cramps, osteoporosis, softening of the bones and PMS.
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Which statement about venation is INCORRECT?
Some flowering plants have leaves that lack venation even though the stems and roots have vascular bundles.
Venation is important for delivering water to leaf cells and taking sugars to the stem.
Venation refers to arrangement of the veins within a leaf.
Venation patterns include pinnate, palmate and dichotomous.
In general, monocots exhibit parallel venation.
Answer:
Some flowering plants have leaves that lack venation even though the stems and roots have vascular bundles.
Explanation:
Venation refers to the arrangement of the veins in the leaf of a plant which are involved in the transport of material in the plants.
The xylem present in leaves transports water to the leaf whereas phloem transports sugar from the leaves to different parts of the plants. In angiosperms, no plants are known whose leaves lack the veins but stem and root possess the vascular bundles.
Monocot is characterised by their parallel veins whereas dicots possess reticulate veins. Also, the compound leaves possess one of the three types of venation that are palmate, pinnate and dichotomous.
Since no angiosperm posses, veinless leaves, therefore, is the correct answer.
. g Determine the number of moles in 0.05 µg of a 300 bp insert DNA. There are 660 g/mol-bp. What is the molar ratio of insert to vector if you have 10 ng of vector that is 2686 bp?
Answer:
a. 2.4 x 10^-24 mol
b. 5.4 x 10^4
Explanation:
a. Mass of DNA (of 0.05µg)= 0.05µg x number of base pairs x 650Da
=0.05x300x650Da
(1 Da=1.67x10-24g)
=9750 x 1.67 x 10^-24
=16282.5 x 10^-19µg =1.62 x10^-21 g
No. of moles of insert DNA=mass of DNA(in g)/mass of one mole in g/mol
=1.6 x 10^-21g/660 g/mol
=2.4 x 10^-24 mol
Hence, moles of the insert DNA is calculated as 2.4 x 10^-24
b.
First of all, let us determine number of moles of vector to calculate the molar ratio.
No. of moles of vector=10 x 10^-9 x 2686 x 650 x 1.67 x 10-24/660
=2.68x6.5x1.67x10-27/660
=4.4 x 10^-29 mol
Molar ratio of insert to vector=2.4 x 10^-24/4.4x10^-29
=5.4 x 10^4
So, the molar ratio of the vector and insert as per the data is calculated as 5.4 x 10^4
How is NADPH different from NADP+?. A. It has lost one electron. B. It has gained one electron. C. It has lost one proton. D. It has gained one proton
Answer:
A. It has lost one electron
Explanation:
Since the H has been replaced by a +, this means that the Hydrogen is now a positive ion. For this to happen, it would have to lose an electron.
Gaining one would make it negative, and protons cannot be gained or lost under normal circumstances.
Answer:
B. It has gained one electron.
Explanation:
Hope it helps .
what is the name used to describe organisms that exist between the living and non living
2. As a result of your initial efforts you were able to detect the presence of protein K using IgG. However, when your lab mate repeated your work after heating protein K they were unable to detect the presence of protein K using IgG. Explain why your lab mate was unable to detect the presence of protein K with IgG even though you demonstrated that it was possible
Answer:
Protein K is a protein that can available in the human cell nucleus that binds to pre-messenger RNA as a part of heterogenous ribonucleoprotein. IgG is one of the five isotypes of immunoglobulin or antibodies.it is the most common antibodies in the blood circulation and makes the 75% of total antibody.
When you heat solution, generally protein k activity increase with an increase in the heat but up to an extent or point called optimum temp. The optimal temperature for activity ranges between 50-65°c. When an increase in temperature help with protein unfolding easing the ability for protein k to break down those proteins.
Choose one of the offspring from the image and decide on your own the genotype of his or her partner then draw a pedigree chart showing the possible genotypes of their offspring make sure your Pedegree chart clearly shows that individuals are homozygous and heterozygous For the hemophilia gene they charge to show all possibilities for the offspring
Answer:Plato answer
Explanation:
A pedigree chart showing the possible genotypes of their offspring is that in which it shows about the affected male and the purebred female.
What are Pedegree chart ?A pedigree indicates relationships among own circle of relatives participants and shows which people have sure genetic pathogenic , traits, and sicknesses inside a own circle of relatives in addition to important status. A pedigree may be used to decide ailment inheritance styles inside a own circle of relatives.
So in this case we will discuss that how the purebred female and the affected male are the genotypes.
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What type of enzyme can activate another enzyme by adding a phosphate from ATP?
Answer:
Here my answer goes.......
Explanation:
In biochemistry, a kinase is an enzyme that catalyzes the transfer of phosphate groups from high-energy, phosphate-donating molecules to specific substrates. This process is known as phosphorylation, where the substrate gains a phosphate group and the high-energy ATP molecule donates a phosphate group.
Why do you think these groups have a high risk of osteoporosis
Answer:
lack or low calcium level
Explanation:
when a person has a low calcium intake, these people are susceptible to having osteoporosis as their bodies would be lacking of much needed calcium.
Low calcium intake increases osteoporosis risk. Lifelong calcium deficiency causes osteoporosis. Low calcium consumption causes bone loss, early bone loss, and fractures.
What is osteoporosis?Osteoporosis is a disorder that causes bones to become brittle and more prone to breaking, which increases the risk of fractures. It manifests itself gradually over the course of several years, but the condition is typically not recognized as a problem until a bone breaks as a result of a fall or a sudden impact. A broken wrist is the type of injury that occurs most frequently in people who have osteoporosis.
People who consume inadequate amounts of calcium are at increased risk for developing osteoporosis. The deficiency of calcium over a lifetime is one of the factors that can contribute to the development of osteoporosis. A diet deficient in calcium has been linked to decreased bone density, an accelerated rate of bone loss, and an increased risk of fractures.
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g Transcription: Transcription Is the process of making an RNA copy of a DNA gene. Is the process of making a protein from a DNA gene. Is the process of making a protein from a mRNA strand. Only occurs in eukaryotes.
Answer:
Transcription Is the process of making an RNA copy of a DNA gene
Explanation:
Transcription is the cellular process for which the information contained in one DNA strand of the double helix is used as template to synthesize an RNA molecule. Transcription uses an RNA polymerase (RNA Pol) to synthesize diverse types of RNA species including, for instance, mRNA, transference RNA (tRNA), ribosomal RNA (rRNA), non-coding RNAs (ncRNAs), etc. Moreover, different Transcription Factors (TFs) are also recruited during the initiation of the transcription which bind to the DNA strand in particular elements named promoters. The formation of the initiation complex (i.e., RNA Pol + TFs) is known as the initiation of transcription, which is subsequently followed by the elongation and, finally, the termination of this process.
Which statements describe the characteristics of an individual protein? Select two options. It is specific to one biochemical reaction. It increases the activation energy needed for a reaction. It can catalyze many different reactions. It increases the rate of a biochemical reaction. It slows down the rate of a biochemical reaction.
Answer: . It is specific to one biochemical reaction
It increases the rate of a biochemical reaction.
Explanation:
Protein acts as enzymes and are useful in reactions that occurs in the cell as a catalyst.
Enzymes are characterized by speeding up the rate of chemical reactions without destroying themselves or disturbing equilibrium that occurs between the reactant and the product. Individual protein are specific to a particular reaction and are good catalyst of chemical reaction as they help to speed up reactions.
The branch of science which deals with chemistry uses in biology is called biochemistry.
The correct option to the question is A and D
The digestion of protein requires the enzyme which catalyzes the reactant and speeds up the reaction by decreasing the activation energy. According to this concept, option B is wrong.
The protein molecule has an active binding site that is specific to each protein. Each protein has a specific type of enzyme that catalyzes the reaction. Hence option C is also wrong.
Hence, the correct option is A and C that is an It is specific to one biochemical reaction and It slow down the rate of a biochemical reaction.
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Which of the following statements is true?A. An isolated system cannot exchange either matter or energy with its surroundings. B. Organisms are open systems when they are out of their habitats. C. Organisms are isolated systems because they have their own machineries in the cells to supply all the matter and energy they need. D. Open systems are called as such because they do not absorb energy, but just openly release the energy to their surroundings.
Answer:
A
Explanation:
An isolated system can NOT exchange energy or matter with it's surroundings. This is why it is isolated.
Which statement best explains why water is essential for all living things?
A) Water makes up 65% of human beings.
B) Water is an essential component of blood.
C) Water covers 7596 of Earth's surface.
D) Water is necessary for cellular functions.
Answer:
d) Water is necessary for cellular functions.
Explanation:
if we cant work on a cellular level, we wont work at all!
hope i helped!
Answer:
the answer is d) in edge 2021
Explanation:
water is necessary for cellular functions
HOPE THIS HELPS
A species of spruce tree occupies the same niche at the mouth of a river that a species of pine tree occupies further upstream. One year, several pinecones fall into the river and are carried to the mouth, where they take root and grow amongst the spruce trees. What will be the most likely result of this occurrence
Answer:
The correct option is: "Either the pine trees or the spruce trees will eventually evolve into a new species."
Explanation:
There will be a competition between spruce trees and pine trees for nutrition and other resources from the environment to grow and spread since they are now occupying the same niche. Overtime, one specie will outlive the other by evolving into a specie that gives it an advantage over the other.
Answer: bears
Explanation: it’s the answer
How can a forensic palynologist help a crime investigation?
Answer: A forensic palynologist can help a crime investigation because they can examine the pollen in the victim and compare it with the pollen from the suspects by using a comparison microscope to tell if it's a match.
Answer: Well, forensics is the study of the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation. So they have an important role in the judicial system because they study criminal reports and files, Identify and classify crime scene evidence through scientific analysis, and then they have to explore possible links between suspects and criminal activity using the results of chemical and physical analyses. So in a crime scene, they might examine the details that they might notice, like the position of the victim or the objects surrounding the scene, test and analyze them, and then follow the leads they get from that.
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which statement describes abiotic factors in an environment ?
Using the key choices choose all responses that apply to the following descriptions. Some terms may be used more than once.
Key:
a. stratum basale
b. stratum corneum
c. stratum granulosum
d. stratum lucidum
e. stratum spinosum
f. papillary layer
g. reticular layer
h. epidermis as a whole
i. dermis as a whole
_____________1. layer of translucent cells in thick skin containing dead keratinocytes
_____________2. two layers containing dead cells.
_____________3. dermal layer responsible for fingeiprints.
_____________4. epidermal layer exhibiting the most rapid cell division.
_____________5. layer including scalelike dead cells, full of keratin, that constantly slough off.
_____________6. layer named for the numerous granules present.
_____________7. location of melanocytes and tactile epithelial cells.
_____________8. area where weblike pre-keratin filaments first appear.
_____________9. deep layer of the dermis
_____________10. layer that secretes a glycolipid that prevents water loss from the skin
Answer and Explanation:
b. stratum corneum: 5. layer including scalelike dead cells, full of keratin, that constantly slough off.
The most superficial epidermal layer conformed of squamous, plane, thin cells with keratin in their cytoplasm, that are continuously released. These cells are replaced by new cells that have the same destiny.
d. stratum lucidum
: 1. layer of translucent cells in thick skin containing dead keratinocytes
Also known as the transparent layer, is only located in the thicker parts of the skin, such as the hands´ palms and the feets´ soles. This layer is so thin that the cells´ edges and some ties their nucleus can not be identified. Keratinocytes are diaphanous and are grouped together. They lack a nucleus and the cytoplasm is filled with a gelatinous substance, eleidin, which will transform into keratin.
b. stratum corneum and d. stratum lucidum 2. two layers containing dead cells.
c. stratum granulosum: 6. layer named for the numerous granules present.
These layer cells contain granules filled with keratohyalin that is needed for keratin production. These cells are arranged in two to four layers, and they begin to degenerate. This is why they show high lysosomes enzymes concentration. This is also the layer where it begins keratinization.
e. stratum spinosum: 10. layer that secretes a glycolipid that prevents water loss from the skin.
8 to 10 irregular cell layers. These cells are rich in DNA necessary for proteinic synthesis that ends in keratin production, and Langerhans cells that belong to the immunity system. This stratus is also known as "Malpigio stratum". It also produces a glycoprotein that helps to prevent water loss.
a. stratum basale 4. epidermal layer exhibiting the most rapid cell division.
7. location of melanocytes and tactile epithelial cells.
Stratum basale is the innermost germinative, single, basal layer of the epidermis composed of basal cuboidal-shaped cells. These cells are the precursor of keratinocytes, this is why this layer is also called germinativum. In this basal layer, there are also Merkel cells as well as melanocytes. The former associated with nerve fibers, transmit part of the touch, and the latter, form the pigment responsible for skin coloring and tanning, melanin.
f. papillary layer: 3. dermal layer responsible for fingerprints.
This stratum is a thin superior layer in the dermis. It has conjunctive tissues and blood vessels that nourish the skin and helps to control the temperature. It´s surface forms papilla that increases the mechanical union between dermis and epidermis.
g. reticular layer: 9. deep layer of the dermis
The inner and thicker layer of the dermis. It is characterized by it´s thick, irregular bundles of collagen fibers and elastic fibers. These are not randomly oriented but forming the regular skin tightening lines known as Langer lines.
h. epidermis as a whole: 7. location of melanocytes and tactile epithelial cells.
Composed of a plane stratified keratinized epithelium that constantly grows and maintains a normal thickness by the process of peeling. The Epidermis is made up of five cell layers, which have different functions: Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
i. dermis as a whole: composed of conjunctive dense tissue that provides support, resistance, and thickness to the skin.
You inject an antibody against the protein tubulin into a living animal cell. After the injection, the cell begins mitosis, but the chromosomes do not become attached to the spindle; in fact, there is no spindle. The contractile ring does, however, form. What do these results mean?
Answer:
The mitotic spindle was “ blocked ” by the action of the antibodies that bind to tubulin.
Explanation:
The tubulin heterodimers consist of α- or β-tubulin structures that form the microtubules, which represent the cytoskeletal of eukaryotic cells. During mitosis, the microtubules are arranged in order to form the mitotic spindle, this structure is critical for the segregation of homologous chromosomes during Anaphase.
Interphase microtubules are required for attaching chromosomes in the middle of the cell during its division, thereby it is expected that the antibodies bind to these microtubules during this process.
The contractile ring is formed by approx. 20 actin filaments that encircle the middle of dividing cells, thereby it is expected that these antibodies are specific of tubulin heterodimers.
Complete this sentence. The CNS communicates with the body proper through ________. View Available Hint(s) Complete this sentence. The CNS communicates with the body proper through ________. some cranial nerves, some spinal nerves, and some additional nerves that were mentioned but not discussed in the tutorial the spinal nerves but not specifically through the cranial nerves the cranial nerves but not specifically through the spinal nerves some (but not all) of the cranial nerves and some (but not all) of the spinal nerves the cranial nerves and the spinal nerves
Answer:
The correct answer is - The cranial nerves and the spinal nerves.
Explanation:
The central nervous system or CNS includes the brain and the spinal cord of the nervous system where it takes sensory information, integrates, and responds accordingly. The spinal cord acts as a conduit for signals between the brain and the rest of the body.
Spinal nerves and crania; both play an essential role in taking sensory information and respond accordingly. Spinal nerves are nerves that help in sending motor, sensory, and autonomic signals between the CNS and the body. The cranial nerves supply information to the CNS and then from the CNS to the body.
Thus, the correct answer is - The cranial nerves and the spinal nerves.
What are cell membranes composed of? Why is it important for the cell membrane to be semi-permeable?
Answer:
With few exceptions, cellular membranes — including plasma membranes and internal membranes — are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Glycerol is a three-carbon molecule that functions as the backbone of these membrane lipids
Cell membranes are semipermeable, which means molecules can move through them. This is pretty important for cells to survive. Osmosis is where solvent molecules (usually water) move from one side of a cell membrane to the other. This happens because the concentration of a solute is higher on one side.
Explanation:
What is a bionomial nomenclature
[tex] [/tex]
In taxonomy, binomial nomenclature, also called binominal nomenclature or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages.
-XxItzAdiXxHow can genomic imprinting affect gene expression in mammalian embryos? How can genomic imprinting affect gene expression in mammalian embryos? Lower expression of the maternal allele of a gene relative to the paternal allele may occur if a maternal allele carries less silencing marks (e.g. methylation) than the paternal allele. Higher expression of the maternal allele of a gene relative to the paternal allele may occur if a paternal allele carries more silencing marks (e.g. methylation) than the maternal allele. Higher expression of the maternal allele of a gene relative to the paternal allele may occur if a paternal allele carries less silencing marks (e.g. methylation) than the maternal allele. Lower expression of the maternal allele of a gene relative to the paternal allele may occur if a paternal allele carries more silencing marks (e.g. methylation) than the maternal allele. Request Answer
Answer:
Genomic imprinting is an epigenetic phenomenon that causes genes to be expressed in a parent-of-origin-specific manner. ... These epigenetic marks are established ("imprinted") in the germline (sperm or egg cells) of the parents and are maintained through mitotic cell divisions in the somatic cells of an organism.
Explanation:
Genomic imprinting affects a subset of genes in mammals and results in a ... In contrast, nonimprinted genes will be expressed from both parental gene ... Surprisingly, mice carrying the mutant nonfunctional allele showed a ... In contrast, embryos that develop within eggs are unable to directly influence maternal resources.
After getting their results in, a group of scientists went back and looked at their study. As planned, their experiment consisted of three groups. The first group received a new medicine at a normal dose, the second group received the medicine at half the dose, and the third group received the medicine at twice the dose. Which of the following best describes what went wrong with the scientists’ study?
Answer:
Their experimental design lacks control group
Explanation:
Based on what I read, the scientists don't have a control group as one of the main groups thus they cannot, in scientific sense, say that the medicine is better or worse. You always need a control group receiving no intervention because then we can compare groups and assess the effectiveness of that intervention (in our case if we had control group vs people who received the medicine, we could see if the people who received the medicine had improved condition etc when compared to participants who did not receive anything)
There is no control group in their experimental design. According to what I've read, the scientists don't have a control group as one of the primary groups. Thus, option C is correct.
What is control group?To determine if the treatment is better or worse in a formal scientific sense. You should always have a control group that does not receive any treatment because this allows us.
To compare the groups and evaluate the effectiveness of the intervention. In our case, if we had a control group and participants who did not receive any treatment, we could see if those participants had better health overall.
By focusing on the impact of a single independent variable, a cause-and-effect link can be established.
The independent variable is altered in the treatment group while being held constant in the control group by researchers. The findings of these groups are then compared.
Therefore, no control group in their experimental design.
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You notice that some E. colicultures failed to grow in the presence of only lactose. You know that normal E. coliare able to metabolize lactose so something must be wrong. Which mutation(s) could explain this
Answer:
The correct answer is "mutations in the lac operon or in the promoter region".
Explanation:
The lac operon es a series of genes that are translated and expressed simultaneously, allowing the cell to metabolize lactose when glucose is absent. The E.coli cultures that failed to grow in the presence of only lactose, could have a mutation that affects the lac operon. This mutation could be present in the promoter region or in the lac operon itself, which will result in the absence of lac operon transcription or in the transcription of one or more non active protein, respectively.
The mutation(s) that could explain why the E. coli cultures failed to grow only in the presence of lactose is: mutations in the lac operon or promoter regions.
Recall:
The lactose operon, also called lac operon, is responsible for the transport and metabolism of lactose in E. Coli when glucose is absent.Thus, the possible reason that would make the E. coli cultures not to grow in the presence of only lactose would most like suggest a mutation which might have occurred in the lac operon or promoter region.
Therefore, the mutation(s) that could explain why the E. coli cultures failed to grow only in the presence of lactose is: mutations in the lac operon or promoter regions.
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Rank each of the following in terms of their appearance in the cell during carbohydrate catabolism. 1 represents the first to appear, and 6 represents the last. (Assume only a single round of carbohydrate catabolism took place.)
(6 items)
(Drag and drop into the appropriate area)
First
1. Glucose
2. Fructose-1,6- bisphosphate
3. Glyceraldehyde-3. phosphate
4. Pyruvate
5. Succinyl-CoA
6. Citric acid
Answer:
Explanation:
The correct order of above question is -
1. Glucose
2. Fructose - 1,6 - biphosphate
3. Glyceraldehyde - 3 - phosphate
4. Pyruvate
5. Citric acid
6. Succinyl co- A
Explanation - These all are the step of carbohydrate metabolism in a cell. The carbohydrate is catabolise and successively into smaller forms.
First four steps show the glycolysis process in which by use of ATP glucose molecule breakdown into simpler one.
Last two steps show the kerb's cycle in which citric acid (six carbon compound) is converted into succinyl co - A ( four carbon compound) .