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Q. No.Select the incorrect statement with reference to mitosis.
1. Splitting of centromere occurs at anaphase.
2. All the chromosomes lie at the equator at metaphase.
3. Spindle fibres attach to centromere of chromosomes.
4. Chromosomes decondense at telophase
Subtopic: Cell Division: Mitosis (Karyokinesis) |
73%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
In prophase I of Meiosis, chromosomes start pairing together and synapsis takes place. This process occurs during which of the following stage?
| 1. | Pachytene | 2. | Diplotene |
| 3. | Leptotene | 4. | Zygotene |
Subtopic: Cell Cycle: Meiosis I |
81%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
Given below are two statements : One is labeled as Assertion (A) and the other is labeled as Reason (R)
| Assertion (A): | The growth of the multicellular organism is due to mitosis |
| Reason (R): | Mitosis is also called as equational division and it offers genetic stability |
In light of the above statements choose the correct answer from the options given below:
| 1. | (A) is correct but (R) is not correct. |
| 2. | (A) is not correct but (R) is correct. |
| 3. | Both (A) and (R) are correct and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are correct but (R) is not the correct explanation of (A). |
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | The beginning of diplotene is recognised by the dissolution of the synaptonemal complex and formation of X shaped structures called chiasmata |
| Reason (R): | In oocytes of some vertebrates, diplotene can last for months or years. |
In the light of the above statements, choose the correct answer from the options given below:
| 1. | (A) is correct but (R) is not correct. |
| 2. | (A) is not correct but (R) is correct. |
| 3. | Both (A) and (R) are correct and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are correct but (R) is not the correct explanation of (A). |
Subtopic: Cell Cycle: Meiosis I |
73%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
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NEET 2023 - Target Batch - Aryan Raj Singh
The oocytes of some vertebrates get arrested for years or months in:
| 1. | Telophase - I | 2. | Diplotene |
| 3. | Diakinesis | 4. | Metaphase - I |
Subtopic: Cell Cycle: Meiosis I |
89%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
Select the correct sequence of events occurring during Prophase-I of Meiosis-I:
| (a) | Nuclear envelope breakdown |
| (b) | Synaptonemal complex formation |
| (c) | Compaction of chromosomes |
| (d) | Terminalisation of chiasmata |
| (e) | Crossing over |
Choose the most appropriate answer from the options given below:
1. (c) → (b) → (e) → (d) → (a)
2. (c) → (a) → (b) → (d) → (e)
3. (b) → (c) → (a) → (d) → (e)
4. (c) → (a) → (b) → (e) → (d)
Subtopic: Cell Cycle: Meiosis I |
60%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?
1. 10
2. 20
3. 30
4. 40
1. 10
2. 20
3. 30
4. 40
Subtopic: Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) |
Please attempt this question first.
Hints
| 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) |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
Given its composition and location, the phragmoplast should be directly involved in the
1. segregation of daughter chromosomes during anaphase
2. poleward migration of centrosomes during prophase
3. synthesis of sporopollenin during G1 and G2 phases
4. construction of the cell plate during cytokinesis
1. segregation of daughter chromosomes during anaphase
2. poleward migration of centrosomes during prophase
3. synthesis of sporopollenin during G1 and G2 phases
4. construction of the cell plate during cytokinesis
Subtopic: Intro to Cell Cycle & Interphase |
66%
From NCERT
Please attempt this question first.
Hints
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: Cell Cycle: Meiosis I |
75%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
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NEET 2023 - Target Batch - Aryan Raj Singh
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