Question

Proteins scan chromosomes for damage during the G1 checkpoint. beginning of the synthesis phase. apoptosis phase. G2 checkpoint. metaphase checkpoint.

Answer 1

I assume that this is your question with the options:

Proteins scan chromosomes for damage during:

A) the G1 checkpoint

B) Beginning of the synthesis phase

C) Apoptosis phase

D) G2 checkpoint

E) Metaphase checkpoint.

Answer:

The answer is option A): G1 checkpoint.

Explanation:

During the internal checkpoints for regulation of a cell cycle, proteins usually scan chromosomes for damage to DNA and evaluate other external factors at the G1 checkpoint in order to ascertain whether conditions are inadequate. If conditions are inadequate and damages exist, cells will not be allowed to continue to the next phase.