Question

A post-reproductive cell remains in phase :

• A. $G_1$
• B. $G_0$
• C. $G_2$
• D. $M$

Answer 1

The correct option is A $G_1$

A post reproductive cell remains in $G_1$ phase. During this phase the cells make the decision to either progress through the restriction point and enter S phase or enter $G_0$.

These decisions are based on extracellular signals that the cell receives and on the integrity of signaling machinery that detects these signals. Deregulation of $G_1$ progression is a frequent occurrence in cancer.

Post reproductive stage of a cell includes cell growth. It refers to the growth of cell that is to increases in cytoplasmic and organelle volume that is in G ₁-phase.