Question

DNA replication occurs in which of the following stages?

• A. G${}_0$ and G${}_1$
• B. G${}_2$ stage
• C. S stage
• D. Mitotic phase

Answer 1

The correct option is C S stage

Interphase is characterized by three major phases G${}_1$ (growth phase 1 or gap 1), S (synthesis) and G${}_2$ (growth phase 2 or gap 2). S phase or the synthesis phase is the part of the cell cycle in which DNA is replicated, occurring between G${}_1$ phase and G${}_2$ phase. DNA replication occurs during this S or synthesis phase. Depending on levels of nutrients, energy, and external factors, cells must decide to enter the cell cycle or move into a non-dividing state known as G${}_0$ phase.

So, the correct answer is option C.