Question

In cell cycle, the mRNA needed for protein synthesis occurs in which of the following?

• A. Synthetic period
• B. Post mitotic gap period
• C. Premitotic gap period
• D. Prophase

Answer 1

The correct option is B Post mitotic gap period

A typical cell cycle comprises of interphase and mitotic phase. The interphase comprises of first growth phase (G${}_1$phase), synthesis phase (S phase) and second growth phase (G${}_2$phase). The G${}_1$ phase is a very active phase of cell cycle. It starts immediately after completion of mitosis and lasts until start of S phase of interphase. Hence, it is also called post-mitotic gap period. Proteins required for DNA replication are synthesized during G${}_1$ phase. Hence, mRNA required for protein synthesis are abundant in G${}_1$or post-mitotic gap phase.

So, the correct answer is option B.