If you are provided with the root tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?

1. Telophase

2. Anaphase

3. Prophase

4. Metaphase 

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 85%
From NCERT
AIPMT - 2004
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Spindle fiber unites with which structure of chromosomes:
1. Chromocenter
2. Chromomere
3. Kinetochore
4. Centriole

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 93%
From NCERT
AIPMT - 2000
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The best material for the study of mitosis in the laboratory:

1. Anther

2. Root tip

3. Leaf tip

4. Ovary

Subtopic:  Intro to Cell Cycle & Interphase |
 85%
From NCERT
AIPMT - 2002
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At which stage of the cell cycle does DNA replication occur:
1. G1 - phase
2. S - phase
3. G2 - phase
4. M - phase

Subtopic:  Intro to Cell Cycle & Interphase |
 96%
From NCERT
AIPMT - 2000
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Amount of cellular DNA increases during:

1. Cytokinesis 2. Fertilisation
3. Mutation 4. Respiration
Subtopic:  Cell Cycle: Meiosis I |
 53%
From NCERT
AIPMT - 1999
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In the somatic cell cycle:
 

1. DNA replication takes place in S-phase
2. A short interphase is followed by a long mitotic phase
3. \(G_2\) phase follows the mitotic phase
4. In  the \(G_1\) phase, DNA content is double the amount of DNA present in the original cell
Subtopic:  Intro to Cell Cycle & Interphase |
 88%
From NCERT
AIPMT - 2004
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Crossing over that results in genetic recombination in higher organisms occurs between:
1. Non-sister chromatids of a bivalent
2. Two daughter nuclei
3. Two different bivalents
4. Sister chromatids of a bivalent

Subtopic:  Cell Cycle: Meiosis I |
 88%
From NCERT
AIPMT - 2004
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What occurs in crossing over:
1.  Recombination
2.  Mutation
3.  Independent assortment
4.  None

Subtopic:  Cell Cycle: Meiosis I |
 94%
From NCERT
AIPMT - 1998
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Centromere is required for:

1. Movement of chromosomes toward poles

2. Cytoplasmic cleavage

3. Crossing over

4. Transcription

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 84%
From NCERT
AIPMT - 2005
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Which of the following stages of meiosis involves division of centromere?

1. Anaphase II

2. Telophase II

3. Metaphase I

4. Metaphase II

Subtopic:  Cell Cycle: Meiosis II |
 81%
From NCERT
NEET - 2021
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