The stage during which separation of the paired homologous chromosomes begins is:

1. Pachytene 2. Diplotene
3. Diakinesis 4. Zygotene
Subtopic:  Cell Cycle: Meiosis I |
 63%
From NCERT
NEET - 2018
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DNA replication in bacteria occurs

(1) during S-phase

(2) within nucleolus

(3) prior to fission 

(4) just before transcription 

Subtopic:  Intro to Cell Cycle & Interphase |
NEET - 2017
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Which of the following options gives the correct sequence of events during mitosis?

1. Condensation, nuclear membrane disassembly, arrangement at the equator, centromere division, segregation, telophase
2. Condensation, crossing over, nuclear membrane disassembly, segregation, telophase
3. Condensation, centromere division, segregation, arrangement at the equator, telophase
4. Condensation, nuclear membrane disassembly, crossing over, segregation, telophase

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 76%
From NCERT
NEET - 2017
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Anaphase Promoting Complex (APC) is protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?

1. Chromosomes will be fragmented

2. Chromosomes will not segregate

3. Recombination of chromosome arms will occur

4. Chromosomes will not condense

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 83%
NEET - 2017
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During cell growth, DNA synthesis takes place in

(1) S-phase                       

(2) G1-phase

(3) G2-phase                     

(4) M-phase 

Subtopic:  Intro to Cell Cycle & Interphase |
 92%
From NCERT
NEET - 2016
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A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that his cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in

(1) polyploidy

(2) somaclonal variation

(3) polyteny

(4) aneuploidy

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 81%
NEET - 2016
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Spindle fibres attach on to 

1. Kinetochore of the chromosome

2. centromere of the chromosome

3. Kinetosome of the chromosome

4. telomere of the chormosome 

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 94%
From NCERT
NEET - 2016
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In meiosis crossing over is initiated at 

1. leptotene

2. Zygotene

3. diplotene

4. pachytene

Subtopic:  Cell Cycle: Meiosis I |
 79%
From NCERT
NEET - 2016
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During cell growth, DNA synthesis takes place in:

1. S-phase

2. G1-phase

3. G2 -phase

4. M-phase

Subtopic:  Intro to Cell Cycle & Interphase |
 94%
From NCERT
NEET - 2016
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When a cell has stalled DNA replication fork, which checkpoint should be predominantly activated?

1. G1/S

2. G2 /M

3. M

4. Both G2/M and M

Subtopic:  Intro to Cell Cycle & Interphase |
NEET - 2016
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