Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Cell Cycle and Cell Division

Multiple Choice Questions

51.

The checkpoint in cell cycle plays important role in

repair DNA damage
apoptosis initiation
assess DNA damage
inhibit cell damage.

52.

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.

53.

Which is the longest phase of the cell cycle

M-phase
interphase
Leptotene
S-phase

54.

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

55.

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

56.
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.

Mitosis occurs after G₀ phase.

G₀ phase is the stage of inactivation of cell cycle due to non-availability of mitogens and energy rich compounds. The cells in this phase remain metabolically active and usually grow in size assuming particular shape (cell differentiation). Cell enters G₀ phase from a cell cycle checkpoint in the G₁ phase. G₁ phase checkpoint (restriction point) takes the key decision whether the cell should divide, delay division or enter resting stage. Cells then remain in G₀ phase until there is a reason for them to divide. Several biocatalysts can help a cell in G₀ phase to proceed through cell division when required.

57.

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.

58.

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.