A: Mitosis does play a role in gamete formation.
R: Haploid organisms divide by mitosis.
 
1. Both Assertion & Reason are true and the Reason is the correct explanation of the Assertion.
2. Both Assertion & Reason are true but the Reason is not the correct explanation of the Assertion
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.
Subtopic:  Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
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Read the four statements (a-d) and choose the correct option.

a. Spindle fibers attach to kinetochores of chromosomes during metaphase.
b. Cell growth results in disturbing the ratio between the nucleus and the cytoplasm.
c. Pachytene stage is relatively short-lived compared to the leptotene.
d. Interkinesis is a short-lived stage characterized by duplication of DNA.

1  a, b & c are correct

2  Only c is incorrect

3  b & d are correct 

4  a & b are correct

Subtopic:  Cell Division: Mitosis (Karyokinesis) | Cell Cycle: Meiosis I |
 64%
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Consider the following four statements (I- IV) related to cell cycle, and select the correct option stating them as true (T) and false (F)

I. Cell growth in terms of cytoplasmic increase is a continuous process.
II. Interphase is the phase of actual cell division.
III. The number of chromosomes doubles in S-phase.
IV. The cell that do not divide further exits G1-phase to enter a metabolically inactive stage.

Options :
         I    II    III    IV

1.      T    F     F      F

2.      F    T     T     T

3.      F    F     T     T

4.      T    F     F     T

Subtopic:  Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) |
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Given below are two statements:
Statement I: In mitosis, chromosomal number in the progeny as well as in parents remains the same
Statement II: Mitosis takes place in gametes

In light of the above statements, choose the most appropriate answer from the options given below:
1. Both statement I and statement II are correct
2. Both statement I and statement II are incorrect
3. Statement I is correct but statement II is incorrect 
4. Statement I is incorrect but statement II is correct 
Subtopic:  Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) | Cell Cycle: Meiosis I |
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Assertion(A): In metaphase, chromosomes are spread through the cytoplasm of the cell.
Reason(R): There is complete disintegration of the nuclear envelope at the end of the prophase.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
From NCERT
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Assertion(A): Metaphase is characterized by all the chromosomes coming to lie at the equator.
Reason(R): Small disc-shaped structures at the surface of the chromosomes are called centromeres.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 76%
From NCERT
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Assertion(A): During Anaphase the centromere is at the leading edge, with the arms of the chromosome trailing behind.
Reason(R): At the onset of Metaphase, the sister chromatids of chromosomes get separated from each other.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 73%
From NCERT
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Assertion(A): Mitosis is called equational division.
Reason(R): The amount of DNA is the same in parent and progeny cells if it is mitosis.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
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Assertion(A): Cell growth disturbs the nuclear-cytoplasmic ratio.
Reason(R): The disturbance in the nucleo-cytoplasmic ratio stimulates cell division.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
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