The spontaneous loss of amino groups from adenine in DNA results ...

Question

The spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage?
a. nuclease, DNA polymerase, DNA ligase
b. telomerase, primase, DNA polymerase
c. telomerase, helicase, single-strand binding protein
d. DNA ligase, replication fork proteins, adenylyl cyclase

Accepted Answer

Hello everyone. And in today's video we have the following problem. The D. N. A. Prepared process involves the removal of the damaged sequence and the replacement of new sequences which of the following is involved in the cleaving of the D. N. A sequences. Rather damage sequences may be removed. And so we're given a series of enzymes that are present in our bodies that we need to identify this from. So let us quickly recall from previous videos on the topic. The function of each of these enzymes, beginning by option A DNA polymerase we have That DNA polymerase is an enzyme present in the replication process of DNA. To replicate DNA strands to create new ones. So this is not really cleaving the DNA as we have here we're going to cancel it out. We don't we have answer choice B. DNA like this is an enzyme mostly present in the repair process of DNA by repairing single stranded breaks in the DNA. So we're going to cancel it out because this process does not involve the cleaving of DNA segments. It involves the repair. However not the cleaving. Then we have answer choice D. Like this is actually not at all involved with D. N. A. It is an enzyme present in digestion that we use for a breakdown of fats. And we can remember this by the beginning this prefix of the word lip which could remind you of the word lipid which is also parts and so these light paste breaks down fat for digestion and is not involved in the cleaving of D. N. A. So we're going to cancel it out as well, all leaving us with answer choice C, which is nucleus is and these nucleus is are the ones that catalyze the cleavage of DNA sequences so that other enzymes may repair it after. So we're going to highlight this as we in our final answer. Thank you very much for sticking around until the end of this video, and I really hope it helped you.

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