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dem82 [27]
3 years ago
10

11. The following graph shows the results of an experiment done by four different

Biology
1 answer:
Neko [114]3 years ago
8 0
The answer is A I think
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Indicate whether each of the following statements is true of depurination (DP), deamination (DA), or pyrimidine dimer formation
solniwko [45]

Answer:

- This process is caused by spontaneous hydrolysis of a glycosidic bond: depurination and deamination

- This process is induced by ultraviolet light:  pyrimidine dimer formation

- This can happen to guanine but not to cytosine: depurination

- This can happen to thymine but not to adenine:  pyrimidine dimer formation

- This can happen to thymine but not to cytosine: none

- Repair involves a DNA glycosylase: deamination

- Repair involves an endonuclease: depurination, deamination and  pyrimidine dimer formation

- Repair involves DNA ligase: depurination, deamination and  pyrimidine dimer formation

-  Repair depends on the existence of separate copies of the genetic information in the two strands of the double helix: depurination, deamination and  pyrimidine dimer formation

- Repair depends on cleavage of both strands of the double helix: none

Explanation:

Depurination is the loss of purine bases (either adenine or guanine), while deamination refers to the removal of an amino group. During depurination, a β-N-glycosidic bond is cleaved by hydrolysis and a nucleic base is released (either adenine or guanine). All DNA bases may undergo deamination, except thymine (since thymine does not have an amino group). The ultraviolet (UV) radiation can cause thymine or cytosine to form dimers (e.g., pyrimidine dimers), being thymine dimers the most common lesion when DNA is exposed to UV light. Pyrimidine dimers may be repaired by different excision mechanisms, e.g., nucleotide excision repair, where the recognition of the DNA damage leads to the removal of the DNA fragment containing the lesion. DNA glycosylases are enzymes involved in the mechanism of base excision, these enzymes recognize and remove damaged bases by hydrolysis of the glycosidic bond, producing an abasic (apurinic and apyrimidinic) site. A DNA ligase enzyme covalently joins two DNA molecules by forming a phosphodiester bond, which is required during these processes.

8 0
2 years ago
For photoperiodism to occur a plant must use which of the following photosensitive pigments?. . A.polychrome. B.phytochrome. C.p
elixir [45]
I think the correct answer among the choices listed above is option B. For photoperiodism to occur, a plant must use a phytochrome. This is a pigment that plants use to detect light. It is sensitive to light in the red region. Hope this answers the question.
3 0
3 years ago
Read 2 more answers
ATP is a form of energy for the cell. ATP is synthesized in a process called cellular respiration. This process takes place in w
7nadin3 [17]
The answer would be D. Because the mitochondria has the energy ATP and is synthesized during cellular respiration.
7 0
3 years ago
Which antibiotic factors would you expect to influence the growth of trees in the mountains
Rainbow [258]
The abiotic factors that affect plant growth and development include topography, soil, and climatic factors. They are the nonliving components of the environment which, along with the biotic or living factors, determine the extent in which the genetically-dictated characters are expressed in the plant.
8 0
3 years ago
A culture of living cells includes a solution called a
Archy [21]

Answer:

C) medium

Explanation:

medium can be solid, semi-solid or liquid

mediums are designed to grow living cells of plants, animals, humans and microbes

brainly.com/question/11473801

4 0
2 years ago
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