How does the DNA repair mechanism distinguish the old strand from the new strand shortly after...
How does the DNA repair mechanism distinguish the old strand from the new strand shortly after replication?
A. the old strand is methylated while the new strand is not
B. the old strand will contain thymine while the new strand contains uracil
C. the new strand is methylated while the old strand is not
D. the new strand has amino acids instead of nucleotides
Homework Answers
Answer
Option A is correct i.e " the old strand is methylated while the new strand is not".
Explanation
In E.coli, methylation pattern is transfered to daughter strand as well but after some time whereas parental DNA (old) is already be methylated. So, by observing rhe methylation pattern we can easily distinguish betyween old and new strand.
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