Cell Cycle Study Guide for Competitive Exams

Cell Cycle

Q. During which phase do cells prepare for mitosis?

Solution

The G2 phase is the period where the cell prepares for mitosis, ensuring all DNA is replicated and the cell is ready to divide.

Correct Answer: C — G2 phase

Q. What happens during the G0 phase?

Solution

During the G0 phase, cells exit the cell cycle and enter a quiescent state, where they are metabolically active but not dividing.

Correct Answer: B — Cells exit the cell cycle and enter a quiescent state

Q. What is the main purpose of the G1 checkpoint?

Solution

The G1 checkpoint assesses cell size and nutrient availability before allowing the cell to proceed to DNA synthesis.

Correct Answer: C — To assess cell size and nutrient availability

Q. What is the primary event during the S phase?

Solution

The primary event during the S phase is DNA synthesis, where the cell replicates its genetic material.

Correct Answer: C — DNA synthesis

Q. What phase of the cell cycle is characterized by DNA replication?

Solution

The S phase is where DNA replication occurs, resulting in the duplication of chromosomes.

Correct Answer: B — S phase

Q. Which checkpoint is crucial for preventing the division of cells with damaged DNA?

Solution

The G2 checkpoint is crucial for preventing the division of cells with damaged DNA by ensuring all DNA is intact before mitosis.

Correct Answer: C — G2 checkpoint

Q. Which phase follows the M phase in the cell cycle?

Solution

The G1 phase follows the M phase, marking the beginning of a new cell cycle after division.

Correct Answer: A — G1 phase

Q. Which phase of the cell cycle is known for cell division?

Solution

The M phase is where mitosis occurs, leading to the division of the cell into two daughter cells.

Correct Answer: D — M phase

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