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Repair of damaged DNA, in some instances and mechanisms, might be viewed as a race between an endonuclease and

A. methylase.
B. DNA polymerase.
C. helicase.
D. primase.
E. DNA ligase.

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Final answer:

In the context of DNA repair, the endonuclease collaborates with DNA helicase, DNA polymerase, and DNA ligase to excise and repair damaged DNA, which is not a competition but a sequential process.

Step-by-step explanation:

The repair of damaged DNA often involves a sequence of events where various enzymes play critical roles. In this context, it might be viewed as a race between an endonuclease, which recognizes and cuts out the damaged section of DNA, and other enzymes involved in the repair process. Specifically, the endonuclease in nucleotide excision repair makes cuts around a damaged nucleotide, DNA helicase unwinds the DNA, and the gap is then filled by DNA polymerase and sealed by DNA ligase. Given this repair pathway, other enzymes such as methylase, primase, or others, are not directly racing with the endonuclease during repair.

Repair of damaged DNA involves multiple mechanisms and enzymes. In the case of a race between an endonuclease and other enzymes, the endonuclease is responsible for recognizing and hydrolyzing the damaged DNA. Then, a DNA helicase unwinds and separates the damaged DNA strand, followed by DNA polymerase filling in the gap and DNA ligase sealing the remaining nick to complete the repair.

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