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Q. No.
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: Â Cell Division: Mitosis (Karyokinesis) |Â Cell Division: Mitosis (Cytokinesis) |
 50%
Level 3: 35%-60%
Hints
| Assertion(A): | Meiosis reduces the chromosome number by half in gametes. |
| Reason(R): | Meiosis is called the reductional 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: Â Cell Cycle: Meiosis I |Â Cell Cycle: Meiosis II |
Level 3: 35%-60%
Hints
| 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: Â Cell Division: Mitosis (Karyokinesis) |
Level 4: Below 35%
Hints
| 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: Â Cell Division: Mitosis (Karyokinesis) |
 75%
Level 2: 60%+
Hints
| 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: Â Cell Division: Mitosis (Karyokinesis) |
 78%
Level 2: 60%+
Hints
| 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: Â Cell Division: Mitosis (Karyokinesis) |
Level 3: 35%-60%
Hints
| Assertion (A): | Cell division, DNA replication, and cell growth have to take place in a coordinated way. |
| Reason (R): | This well coordinated way ensures correct division and formation of progeny cells containing intact genomes. |
| 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: Â Intro to Cell Cycle & Interphase |
 92%
Level 1: 80%+
Hints
Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | In mitosis, chromosomal number in the progeny as well as in parents remains the same |
| Statement II: | Mitosis takes place in gametes |
| 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: Â Intro to Cell Cycle & Interphase |Â Cell Division: Mitosis (Karyokinesis) |Â Cell Cycle: Meiosis I |
Level 3: 35%-60%
Hints
Match List-I with List-II:
Choose the correct answer from the options given below:
1. A - (IV); B - (III); C- (I); D - (II)
2. A - (III); B - (IV); C- (I); D - (II)
3. A - (III); B - (IV); C- (II); D - (I)
4. A - (IV); B - (III); C- (II); D - (I)
| List-I | List-II | ||
| A. | Pairing of homologous chromosomes | I. | Chiasmata |
| B. | Actual interchange of segments between two homologous chromosomes | II. | Synaptonemal complex |
| C. | Protein body formed between paired homologs | III. | Synapsis |
| D. | The cross shaped configuration visible between homologs | IV. | Crossing over |
1. A - (IV); B - (III); C- (I); D - (II)
2. A - (III); B - (IV); C- (I); D - (II)
3. A - (III); B - (IV); C- (II); D - (I)
4. A - (IV); B - (III); C- (II); D - (I)
Subtopic: Â Cell Cycle: Meiosis I |
 81%
Level 1: 80%+
Hints
| Assertion (A): | Tendency of parental combinations to remain together is called crossing over. |
| Reason(R): | Crossing over provides proof in favour of the linear arrangement of genes on chromosomes. |
| 1. | Both (A) & (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) & (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Cell Cycle: Meiosis I |
 54%
Level 3: 35%-60%
Hints
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