Question

part e: critical thinking 11. suppose a mutation damages the gene that controls the g1 checkpoint. predict what might happen to the cell cycle.

Explanation:

The G1 checkpoint ensures the cell has proper nutrients and growth - signals before entering the S - phase. If the gene controlling it is damaged by mutation, the cell may enter the S - phase without proper checks. This could lead to uncontrolled cell division, potentially resulting in cancer. The cell may also accumulate DNA damage as it progresses through the cell cycle without proper surveillance at the G1 checkpoint.

Answer:

The cell may enter the S - phase prematurely, leading to uncontrolled cell division and potential cancer development, or accumulate DNA damage due to lack of proper G1 - phase checks.