Question

Cell cycle can remain arrested in which of the following stages?

• A. G${}_1$
• B. M
• C. G${}_2$
• D. S

Answer 1

The correct option is A G${}_1$

Cell cycle can remain arrested at G${}_1$ phase, During G${}_1$ phase a diploid cell contains the amount of DNA equal to a tetraploid cell. During G${}_1$ phase, the cell grows in size and synthesises mRNA and proteins that are required for DNA synthesis.

Once the required proteins and growth are complete, the cell enters the next phase of the cell cycle, S phase. The duration of each phase, including the G${}_1$ phase, is different in many different types of cells. G${}_1$ phase is particularly important in the cell cycle because it determines whether a cell commits to the division or to leaving the cell cycle. If a cell is signalled to remain undivided, instead of moving onto the S phase, it will leave the G${}_1$ phase and move into a state of dormancy called the G${}_0$ phase.

So, the correct answer is option A.