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
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NEET 2023 - Target Batch - Aryan Raj Singh
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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
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NEET 2023 - Target Batch - Aryan Raj Singh
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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 |
 88%
From NCERT
NEET - 2022
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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
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NEET 2023 - Target Batch - Aryan Raj Singh
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Which stage of meiosis can last for months or years in the oocytes of some vertebrates?
1. Leptotene
2. Pachytene
3. Diplotene
4. Diakinesis
Subtopic:  Cell Cycle: Meiosis I |
 88%
From NCERT
NEET - 2022
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In meiosis, crossing over and exchange of genetic material between homologous chromosomes are catalyzed by the enzyme.
1. Phosphorylase
2. Recombinase
3. Transferase
4. Polymerase
Subtopic:  Cell Cycle: Meiosis I |
 93%
From NCERT
NEET - 2022
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Identify the correct sequence of events during Prophase I of meiosis:
 
a. Synapsis of homologous chromosomes
b. Chromosomes become gradually visible under a microscope
c. Crossing over between non-sister chromatids of homologous chromosomes
d. Terminalisation of chiasmata
e. Dissolution of synaptonemal complex

Choose the correct answer from the options given below :
1. (a), (b), (c), (d), (e)
2. (b), (c), (d), (e), (a)
3. (b), (a), (c), (e), (d)
4. (a), (c), (d), (e), (b)
Subtopic:  Cell Cycle: Meiosis I |
 78%
From NCERT
NEET - 2022
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Bivalent or Tetrad formation is a characteristic feature observed during :
1. Synaptonemal complex in the zygotene stage
2. Chiasmata in the diplotene stage
3. Synaptonemal complex in the pachytene stage
4. Chiasmata in the zygotene stage
Subtopic:  Cell Cycle: Meiosis I |
 67%
From NCERT
NEET - 2022
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With respect to metaphase, which of the following statements is incorrect ?
1. Complete disintegration of nuclear envelope takes place.
2. Chromosomes are highly condensed.
3. Metaphase chromosomes are made up of four sister chromatids held together by centromere.
4. Chromosomes lie at the equator of the cell.
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 65%
From NCERT
NEET - 2022
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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