Question

In a cell cycle the RNA synthesis, needed in protein synthesis, occurs in :

• A. synthetic period
• B. post-mitotic gap period
• C. pre-mitotic gap period
• D. prophase

Answer 1

Answer: (B)

The $G_1$ phase (post mitotic gap period) involves transcription of $3$ types of RNA (r-RNA, m-RNA, t-RNA), proteins necessary for DNA replication and enzymes. Terminally differentiated somatic cells that no longer divide are arrested usually in $G_1$ stage such a type of $G_1$ phase is called $G_2$ phase.