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Related Questions
For all multicellular living things, new cells must be produced from the original single cell.
True
False
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It's true...................
What is the difference between
atoms and molecules
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Answer:
Atoms are single neutral particles. Molecules are neutral particles made of two or more atoms bonded together.
Explanation:
Phage are viruses that must infect bacteria to reproduce. Viral genomes do not contain all the genes needed to produce all proteins necessary for DNA replication, RNA transcription, and protein translation; instead the viruses force bacterial proteins and enzymes to express phage genes instead of bacterial genes.
Phage are very adaptable, and their behavior depends on whether conditions are favorable or unfavorable for making more phage.
When bacteria are plentiful (favorable conditions), viral DNA within the bacteria remains separate from the bacterial chromosome, and the virus forces the bacteria to make more virus. When the amount of virus becomes too much for the cell to hold, the membrane ruptures, and viruses are released to infect surrounding bacteria. This is known as the lytic cycle.
When bacteria are scarce (unfavorable conditions), the viral DNA within the bacteria becomes integrated into the bacterial chromosome. The bacteria survive and are still able to reproduce; viral DNA is transmitted to daughter cells when the bacteria reproduces. This is known as the lysogenic cycle.
As you just read, phage depend on bacteria to reproduce. Phage can be maintained by infecting a culture of bacteria with a strain of phage, and then plating the bacteria on an agar plate to grow.
Suppose that you isolate two mutant strains of phage - one strain cannot enter the lytic cycle and the other strain cannot enter the lysogenic cycle. You also grow wild-type phage as a control. You see three different phenotypes:
A plate with no missing bacteria- the lawn of bacteria is intact
A plate with spots/circles (called plaques) where there are absolutely no bacteria in the circles
A plate with spots/circles (called plaques) where there are some bacteria in the center of the circles.
Based on what you know about what happens in each cycle, match the plating results with the identity of the strain.
Drag each plate into the correct category.
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Answer:
A plate with no missing bacteria- the lawn of bacteria is intact----strain with lysogenic cycle.
A plate with spots/circles (called plaques) where there are absolutely no bacteria in the circles---- lytic cycle
A plate with spots/circles (called plaques) where there are some bacteria in the center of the circles----- wild type phage.
Explanation:
The strain which cannot enter the lytic cycle having no missing bacteria on the plate because the virus remains inside the bacterial cell while on the other hand, the other strain that cannot enter the lysogenic cycle having no bacteria on the circle due to infection of virus spreads throughout the cells and no bacterial cell remains uninfected. One plate having some bacteria and some space having no bacteria due to virus of wild type that shows both cycles.
Help me out thank u !!!!!
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Answer:
A
Explanation:
PLSSS HELP very important test can not fail
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Hope this helps! Good luck!!
what is liver in mammalian body
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Answer: The liver is an organ only found in vertebrates which detoxifies various metabolites, synthesizes proteins and produces biochemicals necessary for digestion and growth. In humans, it is located in the right upper quadrant of the abdomen, below the diaphragm.
Explanation:
What is the effect if any of this mutation on the amino acid chain produced
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Answer:
A missense mutation is a mistake in the DNA which results in the wrong amino acid being incorporated into a protein because of change, that single DNA sequence change, results in a different amino acid codon which the ribosome recognizes. Changes in amino acid can be very important in the function of a protein.
Explanation:
Hope this helps
The effect if any of the mutations on the amino acid chain produces that change is called a "missense mutation," because in this type of mutation, the amino acid gets changed.
What is the significance of the types of mutations?There are many different types of mutations that occur during polypeptide formation, such as those that occur but have no effect on the overall structure and function of the enzyme, proteins, etc.; these are known as "silent mutations," while others result in single amino acid changes and are known as "missense mutations." It has many implications, such as in sickle cell anemia, where a single amino acid change causes a change in the hemoglobin structure.
Hence, the effect if any of the mutations on the amino acid chain produces that change is called a "missense mutation," because in this type of mutation, the amino acid gets changed.
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♀️ please help this is confusing
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it really is i dont even know how to do multiplication 4x4=79
What is the function of the seed (fertilized egg)?
Q#21 on pic
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Answer: Seeds serve several functions for the plants that produce them. Key among these functions are nourishment of the embryo, dispersal to a new location, and dormancy during unfavorable conditions.
Explanation: i hope this answers your question nd have a nice day or night
Please help with this. Will give Brainliest.
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Answer:
A trust me i think im right i want brainiest
Explanation:
how does the enzyme impact activation energy
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Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Explanation:
1. Explain the advantages of compartmentalization in eukaryotic cells.
2. Explain how the nucleus controls protein synthesis in the cytoplasm.
3. List the components of the endomembrane system, and describe the structure and
functions of each component.
4. Describe the pathway of a newly synthesized protein through the endomembrane system
before is secreted out of the cell. What organelles will the protein visit?
5. Explain the biological/physiological relevance of mitochondrial cristae and chloroplast
thylakoids.
6. Describe the evidence that mitochondria and chloroplast are semiautonomous organelles.
7. Explain the mechanism by which microtubules transport vesicles through the cell.
8. Describe the basic structure of the plant cell wall and its function. Discuss the biological
relevance of plasmodesmata.
9. Compare and contrast the role of phospholipids and cholesterol in cell membrane
structure and function.
.0. Define diffusion. Explain why diffusion is a spontaneous process.
.1. Compare and contrast the role of transport proteins and receptor protein in cell
membrane function.
2. Define membrane potential and electrochemical gradient
3. Explain how endocytosis and exocytosis contribute to plasma membrane recycling.
4. Distinguish among osmosis, facilitated diffusion, and active transport.
15. Imagine that you can attach a molecular flag in the membranes of the rough endoplasmic
reticulum (RER). Where would you expect to find such flag if vesicles formed in the RER
deliver their content outside of the cell?
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Answer:
Explanation:
⁰2
How could you classify an animal that behaviourally regulates its body temperature during the daytime? a) homeothermic ectotherm b) homeothermic endotherm c) poikilothermic endotherm d) poikilothermic ectotherm
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Answer:
endotherm. yessiir
Explanation: because im kanye west. a genius
Many tree frog populations are threatened due to habitat loss. In an effort to promote conservation, tree frogs may be bred in captivity. A zoo acquired male and female tree frogs from two different populations. In the zoo, the tree frogs were able to successfully mate within their own population, but breeding attempts between the two populations were unsuccessful. Based on this information, which statement correctly describes the relationship between the two populations of tree frogs?
this is for biology test pleasee someone help
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Answer: Same Genus but different species
Explanation: took the test and came back
The statement which correctly describes the relationship between the two populations of tree frogs is same genus but different species.
What are the characteristics of genus?A genus is a class or group of something. In biology, it's a taxonomic group covering more than one species. This is a term used by biologists to classify more than one species under a larger umbrella.
A species is defined as a group of organisms made up of similar individuals capable of interbreeding or exchanging genes. Genus: A genus is a taxonomic classification that includes closely related species.
Genus is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family.
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How does photosynthesis and cellular respiration compare to each other
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Answer:
Photosynthesis takes place in the chloroplasts of cells. While photosynthesis requires energy and produces food, cellular respiration breaks down food and releases energy. Plants perform both photosynthesis and respiration, while animals can only perform respiration.
Explanation:
Which kidney process ensures that essential compounds such as vitamins and amino acids are not lost through urination? HINT: It's not A.
A. Filtration
B. Selective Reabsorption
C. Secretion
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Cellular differentiation progressively restricts cell fate because the unexpressed genes in the cell: Select all that apply. accumulate near the centromeres. are deleted from the genome. become more densely packed with nucleosomes. accumulate point mutations. undergo irreversible repression.
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Answer:
The correct answer is ''undergo irreversible repression.''
Explanation:
The morphological and physiological transformation of meristematic cells into adult or differentiated tissues constitutes the process of cell differentiation. This, and the consequent specialization of the cell, bring about the division of labor, forming cells with specific functions. Differentiation occurs by differential activation of some genes and repression of others. Depending on the position it occupies, each cell receives certain stimuli to develop the corresponding activities. During the differentiation process, cells undergo a series of changes in their characteristics and there is a readjustment in their mutual relationships.Different molecular factors initiate and drive the programming / reprogramming of cell fate through the modulation of specific genomic and epigenomic patterns, which regulate the expression of activator / repressor genes of the main fundamental and specialized cellular processes. Thus, the differentiated cell will express certain genes and acquire certain functions.Adult stem cells are responsible for maintaining the different types of specialized cells that make up the body. Asymmetric cell division in stem cells has emerged as one of the main physiological mechanisms that regulate the number of cells and their diversity to maintain tissue homeostasis. A large number of molecules, generically called determinants of cell fate, participate in the regulation of asymmetric division. Asymmetric division of somatic stem cells produces both a stem cell and a progenitor. The initial progenitor cells, through new cycles of asymmetric cell division, finally reach their terminal state of cell differentiation, due to changes in intracellular and extracellular (environmental) signaling. After cells leave their mother state and begin to differentiate, they make exclusive selections for phenotypic pathways through secondary genomic / epigenomic modifications, mainly to different types and gradients of transcription factors (physiological programming of cell differentiation). This leads, for example, to activation of specialized biosynthetic pathways, remodeling of the cytoskeleton, and repression of cell proliferation signaling. The expression of genes is regulated mainly at the level of their transcription. Transcription factors correspond to proteins with the ability to interact with specific DNA sequences and trigger their transcriptional activity. Most transcriptional factors contain different domains that participate in different aspects of protein function; they generally contain two domains: a domain that binds to specific DNA sequences and an activation domain that regulates transcription by interacting with other proteins. In the regulation of gene transcription, in addition to transcription factors, coactivating and corepressor molecules participate, which bind to them, modifying their activity in a positive or negative sense. Each cell type has a characteristic pattern of gene transcription, which is determined by the binding of combinations of transcription factors to the regulatory regions of a gene.
Cellular differentiation progressively restricts cell fate because the unexpressed genes in the cell are undergoing irreversible repression.
What does the term gene repression mean?
Gene repression is the switching off of unique genes whose products are needed to support the function of the cell such as the production of vital enzymes or cofactors.
This is specifically important if the products of such genes are not long-lived and deteriorate, or are metabolized.
Thus, option "D" is undergo irreversible repression.
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5. Which of the following statements is correct?
-Reabsorption of water is hormonally controlled
-Normal filtrate contains large amounts of protein
-Most of the water passing through the kidney is eliminated as urine
-The excretion of sodium ions is one of the mechanism that maintains pH balance in the blood.
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Answer:
most of water passing through through the kidney is eliminated as urine
The chemical subunits that make up Deoxyribonucleic Acid and that form the genetic alphabet are called
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Answer: DNA
Explanation:
The chemical subunits that make up Deoxyribonucleic Acid and that form the genetic alphabet are called DNA
Based on the graph which of the following could be used to increase the reaction rate beyond point C
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Find the type of mutation
Substitution, Insertion, Deletion?
Did the mutation change the reading frame?
Yes or No?
How did the mutation change the amino acid sequence?
1 amino acid change, Premature stop signal, All the amino acids are chabged after the point mutation?
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Answer:
the number of members in A municipal corporation depends upon the _______ city
1. What happens to a plant that is put into a dark place? The plant's green color fades because it cannot perform photosynthesis without light. It grows taller.
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Answer: The answer is the green part of the plant faces away because it cannot perform photosynthesis without light.
Explanation: The reason for this is because sunlight is always important to receive while performing photosynthesis because without sunlight, the plant would lose one of its major factors for photosynthesis.
PLEASE HELP ASAP PLEASE
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so you could either say yes you should classify them as different species because they were ultimately adapt differently or you can say no because even though there is a highway they can still cross is just much harder
Name two homologous structures in vertebrates. Why are they so called ? How do such organs help in understanding an evolutionary relationship ?
Please help me with this, i'll reward brainliest.
Answers
Answer:
1) homologous structures in vertebrates - Limbs of birds, mammals, amphibians and reptiles. 2) They are so called since they have similar basic structural plan, but appear different externally and perform different function. However they have evolved from a common ancestor. 3) The homologous characteristics indicate common ancestory.
Explanation:
I just hope this helps!
➜ Two homologous structures in vertebrates are:
Limbs of birds and reptiles.Limbs of reptiles and amphibians.These are so called because the organ have similar structure to perform different functions in various vertebrates.
The homologous characteristics of such organs indicate common ancestory. Thus these exist an evolutionary relationship.
Heparin, a highly negatively charged glycosaminoglycan, is used clinically as an anticoagulant. It acts by binding several plasma proteins, including antithrombin III, an inhibitor of blood clotting. The 1:1 binding of heparin to antithrombin III seems to cause a conformational change in the protein that greatly increases its ability to inhibit clotting. What amino acid residues of antithrombin III are likely to interact with heparin
Answers
Answer:
Positively charged amino acids
Explanation:
Heparin is an acid polysaccharide that has a strong negative charge due to the sulfate groups on its glucosamine residues. This negative charge confers to heparin anticoagulant activity. The negatively charged groups in the heparin molecule can interact with positively charged (basic) residues, such as arginine (Arg) and lysine (Lys) of plasma proteins. For example, it has been shown that lysine amino acid residues of antithrombin III may be involved in the binding with heparin.
The calcium ion passes easily through the membrane of one cell but
cannot cross the membrane of a second cell. Which part of the plasma
membrane allows this substance to cross? *
- Phosphate groups of the phospholipid bilayer allow the ions to cross.
- The fatty acid tails of the phospholipids allow the ions to cross.
- Protein channels in the plasma membrane allow the ions to cross.
- Carbohydrate groups on the membrane allow the ions to cross.
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Answer:
Protein channels in the plasma membrane allow the ions to cross.
Protein channels which are present in the plasma membrane of the cell allow the ions to cross the plasma membrane. Thus, the correct option is C.
What are Protein channels?
Channel protein is a kind of protein which is found embedded in the plasma membrane of the cell. Channel proteins function similar to a pore and it allows the diffusion of small ions and water molecules through them. Channel proteins are lipoproteins and these are synthesized in the rough endoplasmic reticulum of the cell near the nucleus.
Ion channels are the transmembrane proteins whose canonical function is the transport of ions and molecules across the plasma membrane to regulate cell membrane potential and also play an essential role in neural communication, nerve conduction, and muscle contraction in the body.
Therefore, the correct option is C.
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Which is not a characteristic of homologous chromosomes?
A. same length
B. same centromere positon
C. exact same type of alleles
D. same genes
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Answer:
C. exact same type of alleles
Where is cellular respiration involved/what on the picture goes through it? Is there more than one object?
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I tried my best to give this pic an explication plss give a heart it helps a lot
How can new species arise through isolation?
Answers
Answer:
sorta
Explanation:
wit da right ppl it can breed new annimels
The process shown in the diagram produces oxygen and sugar. Which
process uses oxygen and sugar as reactants?
0
Chloroplast
Mitochondrion
Sugar
CO, +H,0
ATP
Heat
Respiration
O A. Cellular respiration
B. Water cycle
c. Transpiration
D. Photosynthesis
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Answer:
Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.
Explanation:
so ts Cellular Respiration
The process uses oxygen and sugar as reactants is the Cellular respiration as it produces ATP as the end product.
What is cellular respiration?Celullar respiration, the system via way of means of which organisms integrate oxygen with meals molecules, diverting the chemical power in those materials into life-maintaining sports and discarding, as waste merchandise, carbon dioxide and water.
Oxygen and glucose are each reactants withinside the system of mobile respiratory. The foremost made of mobile respiratory is ATP; waste merchandise consist of carbon dioxide and water.
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