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Feliz [49]
2 years ago
7

Which pathway is affected by an inherited mutation in the atm gene?

Biology
1 answer:
Katena32 [7]2 years ago
7 0

The question is incomplete as it does not have the options which are:

photoreactivation

reactivation repair pathway

nucleotide excision repair pathway

UV repair pathway

p53 repair pathway

Answer:

p53 repair pathway

Explanation:

ATM gene or ataxia telangiectasia-mutated is a gene which codes for the protein kinase involved in the DNA double-stranded break.

The DNA double-stranded break is repaired easily as the protein kinase is recruited to the site of the break where it allows the DNA repair machinery to repair the DNA.

The gene also controls the cell growth therefore this gene is important to study cancer.  Since the p53 protein is a suppressor protein which if mutated is repaired by the ATM gene and if the gene becomes mutated then the p53 repair pathway is affected.

Thus, p53 repair pathway is the correct answer.

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A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the followin
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Answer:

Collagen genes.

Explanation:

Phylogenetics helps to study the evolutionary relationship among the different group of organisms. The different characteristics like DNA sequences, mitochondria sequences can be used for the construction of phylogeny tree.

Collagen genes can be used to study the evolutionary relationship as mammals contains nearly 30% of total protein. The collagen gene shows the most of the conserved sequences among the different group of organisms and shows the most recent evolved characters in vertebrates.

Thus, the correct answer is collagen genes.  

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How do plants use nitrogen?
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Answer:

Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins. Without proteins, plants wither and die.

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Why does a population of fruit flies in a glass vial in the laboratory grow more slowly as it approaches its carrying capacity?
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I think its b but im not positive

Explanation:

5 0
3 years ago
Read 2 more answers
In the absence of tryptophan, _____.
GenaCL600 [577]

Answer: A

Explanation:The Trp operon is responsible for synthesis of the amino acid trytophan when it is not available in the cellular environment.

When the tryptophan is plentiful, a repressor protein binds to two molecules of tryptophan.

Thiss repressor-tryptophan complex binds to the trp operator. This binding prevents the binding of RNA polymerase, so the operon is not transcribed, and no new trptophan is produce.

On the other hand, when tryptophan levels are reduced, the inactive repressor will not bind the tryptophan operator so the operon is transcribed.

Regulation of the trp operon is determined by the concentration of tryptophan; when adequate tryptophan is present in the growth medium, there is no need for tryptophan biosynthesis.

Transcription is turned off when a high concentration of tryptophan is present, and is turned on when tryptophan is absent. The regulatory signal is the concentration of tryptophan itself.

Therefore in the absence of tryptophan, the inactive repressor cannot bind trpO, so operon gene transcription occurs.

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