The period between two cell cycles

The stage between interphase and mitosis

The stage between mitosis and meiosis

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NEET • BIOLOGY • CELL-CYCLE & CELL DIVISION

Cell-cycle & cell division practice · Mixed difficulty

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1 Hard

1 of 168

Understanding +4 | -1

At metaphase of mitosis, each chromosome consists of ________ chromatid(s) _________ centromere(s) _________ kinetochore(s) and _________ molecule(s) of DNA.

View answer and explanation

Correct option: C

2, 1, 2, 2

Option C (2, 1, 2, 2) is correct because at metaphase, each chromosome consists of two chromatids, one centromere, two kinetochores, and two DNA molecules.

2 Hard

2 of 168

Remembering +4 | -1

Mitosis occurs in:

View answer and explanation

Correct option: D

All of these

Option D (All of these) is correct because mitosis occurs in all somatic cells for growth, repair, and maintenance.

3 Easy

3 of 168

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.

4 Medium

4 of 168

Analyzing +4 | -1

Assertion : Cell growth is a continuous process
in terms of cytoplasmic increase.

Reason : DNA synthesis occurs only during
two specific stages in the cell cycle.

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option C is correct. Cell growth is continuous in terms of cytoplasmic increase, but DNA synthesis occurs only during the S phase, making the reason false.

5 Hard

5 of 168

Remembering +4 | -1

Interkinesis means

View answer and explanation

Correct option: C

The stage between two meiotic stages

Option C (The stage between two meiotic stages) is correct because interkinesis is the brief interphase-like period between meiosis I and meiosis II.

6 Easy

6 of 168

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.

7 Hard

7 of 168

Application +4 | -1

If a daughter cell of a plant, after mitosis contains 6 chromosomes and

20 {pg}

DNA

, then the number of chromosomes and amount of

DNA

respectively in

{G}_2

-phase of the cell is

View answer and explanation

Correct option: B

6 and

40 \,{pg}

Option B (6 and 40 pg) is correct because in the G2 phase, the DNA content doubles after replication, while the chromosome number remains the same as after mitosis.

8 Easy

8 of 168

Understanding +4 | -1

RNA and proteins are formed in

View answer and explanation

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.

9 Hard

9 of 168

Understanding +4 | -1

Assertion (A): Distribution of replicated chromosomes (DNA) to daughter nuclei by a complex series of events is almost accurate phenomenon.

Reason (R): Such distribution of replicated chromosomes to daughter nuclei by a complex series of events is under genetic control.

View answer and explanation

Correct option: A

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Option A (Both (A) & (R) are true and the (R) is the correct explanation of the (A)) is correct because the accurate distribution of chromosomes is genetically controlled.

10 Medium

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Understanding +4 | -1

In some organisms, karyokinesis is not followed by cytokinesis as a result of which multinucleate condition arises leading to the formation of syncytium. The perfect example for this is

View answer and explanation

Correct option: B

liquid endosperm in coconut.

Option B (liquid endosperm in coconut) is correct because the liquid endosperm in coconut is a syncytium formed due to karyokinesis not followed by cytokinesis.

11 Hard

11 of 168

Remembering +4 | -1

During meiosis 1, the chromosomes start pairing at

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Correct option: B

Zygotene

Option B (Zygotene) is correct because chromosome pairing (synapsis) begins during the zygotene stage of prophase I in meiosis I.

12 Hard

12 of 168

Understanding +4 | -1

Assertion (A): Small cells are metabolically less active.

Reason (R): K.I. of small cells is less.

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Correct option: D

Both (A) and (R) are false

Option D (Both (A) and (R) are false) is correct because small cells are metabolically MORE active and have a HIGHER K.I. (Karyoplasmic Index).

13 Medium

13 of 168

Remembering +4 | -1

Most cytogenic activities occur during

View answer and explanation

Correct option: A

Interphase

The correct answer is A (Interphase) because most cytogenetic activities, such as DNA replication and cell growth, occur during interphase.

14 Hard

14 of 168

Remembering +4 | -1

Transition to metaphase in followed by?

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Correct option: A

Diakinesis

Option A (Diakinesis) is correct because diakinesis is the stage that immediately follows diplotene in prophase I of meiosis.

15 Medium

15 of 168

Analyzing +4 | -1

(A) Reduction division occurs in anaphase so there is no need to meiosis
(R) Meiosis II occurs to separate homologous chromosomes

View answer and explanation

Correct option: D

Both A and R is false

Option D (Both A and R is false) is correct because reduction division occurs in meiosis I (not anaphase in general), and meiosis II separates sister chromatids, not homologous chromosomes.

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16 Medium

16 of 168

Understanding +4 | -1

Choose the correct combination of options to select the correct statement for prophase
I. Chromosomal material condenses to form compact mitotic chromosomes
II. The assembly of mitotic spindle is initiated by the microtubules
III. Cells do not show organelles when viewed under the prophase
IV. The nucleolus or nucleoli degenerate completely

View answer and explanation

Correct option: D

All of these

Option D (All of these) is correct because all the statements accurately describe events during prophase of mitosis.

17 Hard

17 of 168

Understanding +4 | -1

Which of the following statements are correct for meiosis?
I. Meiosis is a double division. It gives rise to four cells
II. The cells undergoing meiosis may be haploid or diploid
III. No bouquet stage is recorded
IV. Pairing or synapsis of homologous chromosomes takes place during zygotene of prophase-I and continues upto metaphase-I
Option containing correct statement is

View answer and explanation

Correct option: B

I and IV

Option B (I and IV) is correct because Meiosis is a double division resulting in four cells, and pairing/synapsis of homologous chromosomes occurs during zygotene of prophase-I and continues up to metaphase-I.

18 Medium

18 of 168

Remembering +4 | -1

The plane of alignment of chromosome at the metaphase stage of cell cycle is referred to as the

View answer and explanation

Correct option: B

Metaphase plate

Option B (Metaphase plate) is correct because the metaphase plate is the plane where chromosomes align during metaphase.

19 Easy

19 of 168

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.

20 Easy

20 of 168

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.

21 Medium

21 of 168

Remembering +4 | -1

Replication of centriole occurs during

View answer and explanation

Correct option: A

Interphase

The correct answer is A (Interphase) because centriole replication occurs during the S phase of interphase.

22 Easy

22 of 168

Application +4 | -1

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

View answer and explanation

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).

23 Medium

23 of 168

Understanding +4 | -1

Cell would normally proceed to mitosis without interruption

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Correct option: A

Once it had started the S-period

The correct answer is A (Once it had started the S-period) because once a cell has initiated DNA replication in the S-phase, it is generally committed to completing the cell cycle and proceeding to mitosis.

24 Medium

24 of 168

Understanding +4 | -1

The M-phase starts with the …A…, corresponding to the separation of daughter chromosomes, known as …B… and usually ends with division of cytoplasm which is known as …C…
Identify A-C to complete the given NCERT statement

View answer and explanation

Correct option: B

A-nuclear division; B-karyokinesis; C-cytokinesis

Option B (A-nuclear division; B-karyokinesis; C-cytokinesis) is correct because the M-phase starts with nuclear division (karyokinesis) and ends with cytoplasmic division (cytokinesis).

25 Medium

25 of 168

Remembering +4 | -1

Meiosis can be observed in

View answer and explanation

Correct option: D

Spore mother cells

Option D is correct because meiosis occurs in spore mother cells to produce haploid spores.

26 Easy

26 of 168

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

View answer and explanation

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.

27 Easy

27 of 168

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.

28 Hard

28 of 168

Understanding +4 | -1

Assertion (A): Growth and reproduction are characteristics of cells, indeed of all living organism.

Reason (R): Cycle of growth and division allow a single cell to form a structure consisting of millions of cells.

View answer and explanation

Correct option: A

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Option A (Both (A) & (R) are true and the (R) is the correct explanation of the (A)) is correct because growth and reproduction are indeed characteristics of cells, and the cycle of growth and division explains how a single cell forms a multicellular structure.

29 Medium

29 of 168

Understanding +4 | -1

Which of the following statement is true for cells in

{G_0}

stage of cell cycle?

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Correct option: C

Cells are metabolically active but no longer proliferate in normal condition

Option C (Cells are metabolically active but no longer proliferate in normal condition) is correct because cells in G0 phase are not inactive but have exited the cell cycle and do not divide.

30 Easy

30 of 168

Remembering +4 | -1

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

View answer and explanation

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.

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 168 single-correct-answer MCQs on CELL-CYCLE & CELL DIVISION.
✓ Try each question before opening its answer. Read the explanation where one is available.
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Cell-cycle & cell division practice · Mixed difficulty

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