In which phase of the cell cycle is genetic material (DNA) replicated?

• A. M phase
• B. S phase
• C. G1 phase
• D. G2 phase

Answer: (B)

Verified step by step guidance

1. Understand the cell cycle: The cell cycle consists of several phases that a cell goes through to divide and produce new cells. These phases include G1, S, G2, and M phases.
2. Identify the purpose of each phase: The G1 phase is the first gap phase where the cell grows and prepares for DNA replication. The S phase is where DNA replication occurs. The G2 phase is the second gap phase where the cell prepares for mitosis. The M phase is where mitosis and cytokinesis occur, leading to cell division.
3. Focus on DNA replication: DNA replication is a critical process where the cell duplicates its genetic material to ensure that each daughter cell receives an identical set of chromosomes.
4. Determine the phase for DNA replication: Since DNA replication is the process of duplicating the genetic material, it specifically occurs during the S phase of the cell cycle.
5. Conclude with the correct phase: Based on the understanding of the cell cycle, the S phase is the phase in which genetic material (DNA) is replicated.