Phase of cell cycle when DNA polymerase is active

Options

A. `G_(1)`
B. S
C. `G_(2)`
D. M

Answer

To determine the phase of the cell cycle when DNA polymerase is active, follow these steps:

1. **Understand the Cell Cycle Phases**: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has distinct functions related to cell growth and division.

2. **Identify the Role of DNA Polymerase**: DNA polymerase is an enzyme that plays a crucial role in DNA replication. Its primary function is to synthesize new strands of DNA by adding nucleotides to a growing DNA chain.

3. **Locate the Phase of DNA Replication**: DNA replication occurs during the S phase of the cell cycle. This phase is specifically designated for the synthesis of DNA, where the cell duplicates its genetic material in preparation for cell division.

4. **Conclude the Active Phase**: Since DNA polymerase is responsible for the replication of DNA, and this process occurs during the S phase, we can conclude that DNA polymerase is most active during this phase.

5. **Final Answer**: Therefore, the phase of the cell cycle when DNA polymerase is active is the S phase.