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NEET • BIOLOGY • CELL-CYCLE & CELL DIVISION

Cell-cycle & cell division practice · Easy

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Showing 1-30 of 46 questions

1 Easy

1 of 46

Understanding +4 | -1

In which phase, DNA content will be doubled?

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Correct option: A

Interphase

Option A (Interphase) is correct because DNA replication occurs during the S phase of interphase, leading to a doubling of the DNA content.

2 Easy

2 of 46

Remembering +4 | -1

What is the approximate duration of cell cycle for a mammalian cell?

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Correct option: B

24 hrs

Option B (24 hrs) is correct because the approximate duration of the cell cycle for a typical mammalian cell is around 24 hours.

3 Easy

3 of 46

Understanding +4 | -1

RNA and proteins are formed in

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Correct option: B

{G_2}

-phase

The correct answer is B (

{G_2}

-phase) because RNA and proteins necessary for mitosis are synthesized during the

{G_2}

phase.

4 Easy

4 of 46

Remembering +4 | -1

During which stage of meiosis, do the sister chromatids begin to move towards the poles?

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Correct option: C

Anaphase-II

Option C is correct because during anaphase II, the sister chromatids separate and begin to move towards the poles.

5 Easy

5 of 46

Application +4 | -1

How many microspore mother cells will give rise to 256 microspores after reduction division?

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Correct option: C

64

Option C (64) is correct because each microspore mother cell produces 4 microspores, so 256 microspores require 256/4 = 64 microspore mother cells.

6 Easy

6 of 46

Application +4 | -1

ln an angiospermic plant, how many meiosis are required for the formation of 104 male gametes from microspore mother cell?

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Correct option: A

Option A (13) is correct because each microspore mother cell undergoes one meiosis to produce 4 microspores, and each microspore develops into 2 male gametes. Therefore, to produce 104 male gametes, 52 microspores are needed, requiring 13 meiotic divisions (52/4 = 13).

7 Easy

7 of 46

Understanding +4 | -1

…A…. mitotic cell division is only seen in the diploid somatic cells, while the …B… can show mitotic divisions in both haploid and diploid cells.
Identify A and B form the options given below

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Correct option: A

A-Animals; B-plants

Option A (A-Animals; B-plants) is correct because mitosis in animals is generally restricted to diploid cells, while plants can have mitosis in both haploid and diploid cells.

8 Easy

8 of 46

Understanding +4 | -1

In meiosis, chromosome number becomes

View answer and explanation

Correct option: A

Half of its parent chromosome

Option A (Half of its parent chromosome) is correct because meiosis reduces the chromosome number from diploid (2n) to haploid (n), which is half the number of chromosomes in the parent cell.

9 Easy

9 of 46

Remembering +4 | -1

Which of the following stage of cell cycle is known as quiescent stage?

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Correct option: C

{G_0}

-phase

Option C (

{G_0}

-phase) is correct because cells in the G0 phase have exited the cell cycle and are in a quiescent state.

10 Easy

10 of 46

Understanding +4 | -1

Assertion: Cell growth results into division
Reason: Cell growth leads to change in nucleocytoplasmic
ratio

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Correct option: A

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

Option A (If both the assertion and the reason are true and the reason is a correct explanation of the assertion) is correct because cell growth increases the nucleocytoplasmic ratio, triggering cell division.

11 Easy

11 of 46

Remembering +4 | -1

The division of the cytoplasm is termed as

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Correct option: C

Cytokinesis

Option C (Cytokinesis) is correct because cytokinesis specifically refers to the division of the cytoplasm following nuclear division (karyokinesis).

12 Easy

12 of 46

Understanding +4 | -1

What is the essential criterium for growth of organisms?

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Correct option: C

Cell division

Option C (Cell division) is correct because cell division is essential for increasing cell number and thus for the growth of organisms.

13 Easy

13 of 46

Remembering +4 | -1

Small disc-shaped structures at the surface of the centromeres that appear during metaphase are

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Correct option: A

Kinetochores

Option A (Kinetochores) is correct because kinetochores are disc-shaped structures on centromeres where spindle fibers attach.

14 Easy

14 of 46

Remembering +4 | -1

Sequence of four phases of cell cycle is

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Correct option: A

{G_1} \to S \to {G_2} \to M

Option A (

{G_1} \to S \to {G_2} \to M

) is correct because this is the correct sequence of the four phases of the cell cycle.

15 Easy

15 of 46

Understanding +4 | -1

In which of the following stages of the cell cycle chromosome number becomes half?

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Correct option: B

Anaphase-I

Option B (Anaphase-I) is correct because the chromosome number is halved during anaphase I of meiosis when homologous chromosomes are separated and pulled to opposite poles.

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16 Easy

16 of 46

Understanding +4 | -1

Select the correct option

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Correct option: B

Division of the nucleus occurs before the division of the cytoplasm

Option B (Division of the nucleus occurs before the division of the cytoplasm) is correct because karyokinesis (nuclear division) typically precedes cytokinesis (cytoplasmic division).

17 Easy

17 of 46

Remembering +4 | -1

Karyokinesis refers to the division of

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Correct option: B

The nucleus

Option B (The nucleus) is correct because karyokinesis specifically refers to the division of the cell's nucleus during cell division.

18 Easy

18 of 46

Remembering +4 | -1

The transition between meiosis-I and meiosis-II is

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Correct option: A

Interkinesis

Option A is correct because interkinesis is the brief interphase-like period between meiosis I and meiosis II, where no DNA replication occurs.

19 Easy

19 of 46

Remembering +4 | -1

In animal cell – cycle, centriole duplicates occurs during

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Correct option: C

S-Phase

Option C (S-Phase) is correct because centriole duplication in animal cells occurs during the S-phase of the cell cycle, along with DNA replication.

20 Easy

20 of 46

Understanding +4 | -1

Which of the following phase of the cell cycle is not a part of interphase?

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Correct option: B

The correct answer is B (M) because the M phase (mitosis) is a distinct phase of the cell cycle, separate from interphase, which includes G1, S, and G2 phases.

21 Easy

21 of 46

Understanding +4 | -1

During mitosis, number of chromosomes gets

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Correct option: B

No change

Option B (No change) is correct because mitosis is an equational division where the chromosome number remains the same in daughter cells.

22 Easy

22 of 46

Understanding +4 | -1

How many generations of mitosis are required for producing 32 cells?

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Correct option: D

Option D (5) is correct because each mitotic division doubles the number of cells, so 32 cells require 5 generations (

2^5 = 32

23 Easy

23 of 46

Understanding +4 | -1

Assertion: Mitosis is an equational division

Reason: Number of chromosomes in the parent and progeny cells is the same.

View answer and explanation

Correct option: A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Option A (Both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because mitosis is equational division and the chromosome number remains the same.

24 Easy

24 of 46

Understanding +4 | -1

In meiosis, the chromosome number

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Correct option: A

Reduces by half

Option A (Reduces by half) is correct because meiosis is a reductional division, meaning it reduces the chromosome number from diploid (2n) to haploid (n), which is half the original number.

25 Easy

25 of 46

Understanding +4 | -1

Meiosis in AaBb will produce gametes

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Correct option: A

AB, aB, Ab, ab

Option A (AB, aB, Ab, ab) is correct because with independent assortment during meiosis, an AaBb genotype will produce all four possible combinations of alleles in the gametes.

26 Easy

26 of 46

Remembering +4 | -1

At the end of meiosis-II, number of haploid cells formed are

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Correct option: B

Four

Option B is correct because meiosis II results in the formation of four haploid cells from the two haploid cells produced in meiosis I.

27 Easy

27 of 46

Understanding +4 | -1

What is the nature of cells formed at the end of meiosis-II?

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Correct option: A

Haploid

Option A (Haploid) is correct because meiosis II results in the separation of sister chromatids, producing haploid cells, each with one set of chromosomes.

28 Easy

28 of 46

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Which of the protein is found in spindle fibre?

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Correct option: A

Tubulin

Option A (Tubulin) is correct because spindle fibers are primarily composed of tubulin protein.

29 Easy

29 of 46

Remembering +4 | -1

Chromosomes are visible with chromatids at which phase of mitosis?

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Correct option: C

Metaphase

Option C is correct because chromosomes are most clearly visible with chromatids during metaphase of mitosis due to their maximum condensation.

30 Easy

30 of 46

Understanding +4 | -1

Choose the correct sequence of two main events in mitosis

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Correct option: A

Karyokinesis followed by cytokinesis

Option A (Karyokinesis followed by cytokinesis) is correct because karyokinesis (nuclear division) precedes cytokinesis (cytoplasmic division) in mitosis.

Revision notes and key takeaways

Review CELL-CYCLE & CELL DIVISION in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 46 single-correct-answer MCQs on CELL-CYCLE & CELL DIVISION.
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