Cell Biology - Cell Cycle & Division

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Q1. Which checkpoint in the cell cycle ensures that DNA is not damaged before replication? (2023)

Solution:

The G1 checkpoint assesses the cell's size and DNA integrity before it enters the S phase for replication.

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Q2. Which of the following is NOT a stage of the cell cycle? (2019)

Solution:

Synthesis is not a stage of the cell cycle; it refers to the S phase where DNA is replicated.

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Q3. What is the role of cyclins in the cell cycle? (2019)

Solution:

Cyclins are proteins that regulate the progression of the cell cycle by activating cyclin-dependent kinases (CDKs).

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Q4. In which phase of the cell cycle does the cell spend the majority of its life? (2021)

Solution:

The G1 phase is where the cell spends most of its life, performing normal functions and growing.

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Q5. Which phase of the cell cycle is characterized by the preparation for mitosis? (2021)

Solution:

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

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Q6. During which phase of mitosis do the chromosomes align at the cell's equatorial plane? (2021)

Solution:

During metaphase, chromosomes align at the metaphase plate, preparing for separation.

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Q7. In which phase do sister chromatids separate and move towards opposite poles? (2022)

Solution:

During Anaphase, sister chromatids are pulled apart and move towards opposite poles of the cell.

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Q8. What is the term for the division of the cytoplasm during cell division? (2020)

Solution:

Cytokinesis is the process that divides the cytoplasm of a parental cell into two daughter cells.

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Q9. What is the role of the M checkpoint in the cell cycle? (2023)

Solution:

The M checkpoint ensures that all chromosomes are properly aligned at the metaphase plate before the cell proceeds to anaphase.

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Q10. In which phase do sister chromatids separate and move to opposite poles of the cell? (2019)

Solution:

During Anaphase, sister chromatids are pulled apart and move towards opposite poles of the cell.