Question

What is the name of the control factor in G1 phase of mitosis which causes cyclin to rise so the cell can move on _____ or ______.

a) Checkpoint; S phase; G2 phase
b) Restriction point; S phase; G2 phase
c) G1 checkpoint; S phase; G2 checkpoint
d) Start checkpoint; G2 phase; S phase

Answer 1

The name of the control factor in the G1 phase of mitosis that causes cyclin to rise so the cell can move on is the G1 checkpoint. The G1 checkpoint plays a crucial role in determining whether all conditions are favorable for cell division to proceed.

Step-by-step explanation:

The name of the control factor in the G1 phase of mitosis that causes cyclin to rise so the cell can move on is the G1 checkpoint. The G1 checkpoint, also known as the restriction point, is a crucial decision point for the cell to commit to the cell division process. External factors, such as growth factors, play a major role in allowing the cell to progress past the G1 checkpoint. In addition to cell size and reserves, the G1 checkpoint also checks for genomic DNA damage before allowing the cell to move on to the S phase.