Biology
Cell Cycle and Chromosomes
1,348 Questions
Explore a curated list of questions covering the cell cycle, mitosis, and meiosis. Topics include DNA replication, chromosomal structures, and genetic disorders. This material is essential for students preparing for biology and general science competitive exams.
Cell cycle eventsDNA replicationMeiosis processChromosomal structuresGenetic disorders
Cell Cycle and Chromosomes Questions
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Division of centromere.
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The daughter chromosomes begin moving towards opposite poles of the cell due to the action of the spindle.
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Chromosomes arrange themselves at equatorial plane.
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Complete set of chromosomes assembles at each pole of the cell.
C
Correct answer
Explanation
Chromosomes arrange themselves at equatorial plane in metaphase.
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G1 phase
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G2 phase
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M phase
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S phase
C
Correct answer
Explanation
During M phase, the contents of nucleus and cytoplasm are divided.
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end of telophase
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end of cytokinesis
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end of cell cycle
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end of interphase
B
Correct answer
Explanation
End of cytokinesis marks the end of M-phase.
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prometaphase
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early anaphase
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prophase
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metaphase
A
Correct answer
Explanation
Disintegration of nuclear envelope takes place at prometaphase.
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Preprophase
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Prophase
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Prometaphase
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Metaphase
B
Correct answer
Explanation
Mitotic spindle formation initiates at prophase.
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Securin
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Separase
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Cohesin
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Condensin
C
Correct answer
Explanation
Cohesin binds two identical sister chromatids at centromere.
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Telophase
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Anaphase
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Prometaphase
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Metaphase
B
Correct answer
Explanation
The sister chromatids become full-fledged chromosomes at anaphase.
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Metaphase
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Prometaphase
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Anaphase
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Prophase
B
Correct answer
Explanation
Kinetochore formation takes place in prometaphase around the centromere.
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Reverse of prophase
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Initiation of cytokinesis
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Initiation of meiosis
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End of cell cycle
A
Correct answer
Explanation
Formation of nuclear envelope and uncoiling of chromosomes signifies reverse of prophase.
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The nucleolus disappears during early prophase.
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Centrosomes are essential for spindle formation.
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A single centromere is inherited by a cell during cell division.
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Centrosomes polymerise a protein called tubulin to help form the microtubule apparatus.
B
Correct answer
Explanation
Centrosomes are not essential for spindle formation.
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P - 3% M - 4% A - 1% T - 2%
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P - 1% M - 4% A - 3% T - 2%
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P - 3% M - 2% A - 1% T - 4%
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P - 2% M - 4% A - 1% T - 3%
A
Correct answer
Explanation
This is the correct percent-wise distribution of time taken in each step.
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mitochondria
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endoplasmic reticulum
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golgi apparatus
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centriole
C
Correct answer
Explanation
During cell division, one of the cell organelles, instead of being equally divided between the two daughter cells at cytokinesis, becomes dispersed into small vesicles at prophase to reassociate at telophase. The organelle is golgi apparatus.
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G1 phase
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S phase
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G2 phase
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M phase
B
Correct answer
Explanation
DNA replication takes place in S-phase.
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DNA content doubles in G1 phase.
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There is no change in DNA content of cell in G1 phase.
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Chromatin treads are formed in G1 phase.
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No cell organelles are formed in G1 phase.
B
Correct answer
Explanation
There is no change in DNA content of cell in G1 phase.
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meiosis
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mitosis
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Both 1 and 2
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Neither 1 nor 2
B
Correct answer
Explanation
Cell cycle continues in mitosis.