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Q. No.Match List I with List II:
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
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)
Subtopic: Â Cell Cycle: Meiosis I |
 80%
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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 |
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| A: | Tendency of parental combinations to remain together is called crossing over. |
| R: | Crossing over provides proof in favour of the linear arrangement of genes on chromosomes. |
| 1. | If both Assertion & Reason are true and the reason is the correct explanation of the assertion.. |
| 2. | If both Assertion & Reason are true but the reason is not the correct explanation of the assertion. |
| 3. | If Assertion is a true statement but Reason is false.. |
| 4. | If both Assertion and Reason are false statements. |
Subtopic: Â Cell Cycle: Meiosis I |
 53%
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Select the correct option based on statements below:
| Assertion (A): | Meiosis leads to recombinations of genes. |
| Reason (R): | Crossing over occurs in pachytene sub-stage of prophase I of meiosis. |
| 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. | Both (A) and (R) are false. |
Subtopic: Â Cell Cycle: Meiosis I |
 75%
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| Assertion(A): | Mitosis does play a role in gamete formation. |
| Reason(R): | Haploid organisms divide by mitosis. |
| 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 a true statement but (R) is false. |
| 4. | Both (A) and (R) are false statements. |
Subtopic: Â Cell Division: Mitosis (Karyokinesis) |Â Cell Division: Mitosis (Cytokinesis) |
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| 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. |
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 Intro to Cell Cycle & Interphase |
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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: Â Cell Division: Mitosis (Karyokinesis) |
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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.
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) |
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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.
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) |
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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: Â Cell Division: Mitosis (Karyokinesis) |
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