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 Multiple Choice QuestionsMultiple Choice Questions


The checkpoint in cell cycle plays important role in

  • repair DNA damage

  • apoptosis initiation

  • assess DNA damage

  • inhibit cell damage.


Barr Body is found in the cytoplasm during

  • interphase in cell of female mammal

  • interphase in cell of male mammal

  • prophase in cell of female mammal

  • prophase in cell of male mammal.


Which is the longest phase of the cell cycle

  • M-phase

  • interphase

  • Leptotene

  • S-phase


In a diploid cell, at which stage of cell cycle, the amount of DNA is doubled?

  • G1 and G2 phase

  • G0 phase

  • S, G2 and M phase

  • S phase


Microtubule depolymerizing drug such as colchicine is expected to

  • inhibit spindle formation during mitosis

  • inhibit cytokinesis

  • allow mitosis beyond metaphase

  • induce formation of multiple contractile rings


Which of the following statements is incorrect about G0 phase

  • Mitosis occurs after G0 phase.

  • Biocatalysts can be used to exit G0 phase.

  • Cell volume keeps on increasing during this phase.

  • Cell metabolism occurs continuously in G0 phase.


Assertion: Meiosis II is similar to mitosis.

Reason : Meiosis I cannot occur in haploid cells.

  • If both assertion and reason are true and reason is the correct explanation.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false

  • If both assertion and reason are false.


Which of the following is not a characteristic of meiosis

  • It involves two stages of DNA replication one before meiosis-I and another before meiosis-II

  • It involves recombination and crossing over

  • Sister chromatids separate during anaphase II

  • Nuclear membrane disappears during prophase.


When synapsis is complete all along the chromosome, the cell is said to have entered a stage called

  • zygotene

  • pachytene

  • diplotene

  • diakinesis


The importance of meiosis lies in :

  • bringing discontinuous variations

  • addition in the number of chromosomes

  • reduction in the number of chromosomes

  • maintaining the number of chromosomes