Cell Cycle and Cell Division

Q. During which phase of mitosis do the chromosomes align at the cell's equatorial plane?

Solution

In metaphase, chromosomes line up at the metaphase plate before being separated.

Correct Answer: B — Metaphase

Q. What is the main event that occurs during anaphase?

Solution

During anaphase, sister chromatids are pulled apart to opposite poles of the cell.

Correct Answer: B — Sister chromatids separate

Q. What is the primary purpose of the G1 checkpoint in the cell cycle?

Solution

The G1 checkpoint assesses cell size, nutrients, and DNA integrity before proceeding to DNA synthesis.

Correct Answer: C — To assess cell size and nutrients

Q. What is the role of the spindle fibers during mitosis?

Solution

Spindle fibers attach to kinetochores and help separate sister chromatids during mitosis.

Correct Answer: B — To separate sister chromatids

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. What triggers the onset of apoptosis during the cell cycle?

Solution

Severe DNA damage can trigger apoptosis to prevent the propagation of damaged cells.

Correct Answer: A — DNA damage

Q. Which of the following is NOT a phase of mitosis?

Solution

Interphase is not a phase of mitosis; it is the phase where the cell prepares for division.

Correct Answer: C — Interphase

Q. Which phase of the cell cycle is known as the resting phase?

Solution

The G0 phase is a resting state where cells are not actively preparing to divide.

Correct Answer: A — G0 phase

Q. Which protein complex is crucial for the transition from G2 phase to mitosis?

Solution

Cyclin B forms a complex with CDK1, which is essential for the G2 to M phase transition.

Correct Answer: C — Cyclin B

Showing 1 to 9 of 9 (1 Pages)