During cell division, the spindle fibres attach to the chromosomes at a region called

1. chromocentre

2. kinetochore

3. centriole

4. chromomere

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 93%
From NCERT
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Synapsis occurs between

1. a male and a female gamete

2. mRNA and ribosomes

3. spindle fibres and centromere

4. two homologous chromosomes

Subtopic:  Cell Cycle: Meiosis I |
 90%
From NCERT
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Best stage to observe shape, size and number of chromosomes is

1. interphase

2. metaphase

3. prophase

4. telophase

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 89%
From NCERT
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Meiosis has evolutionary significance because it results in 

1. genetically similar daughters

2. four daughter cells

3. eggs and sperms

4. recombinations

Subtopic:  Cell Cycle: Meiosis I |
 65%
From NCERT
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Meiosis I:

1. is always followed by interphase
2. is not followed by any period of rest
3. is followed by a period of interkinesis
4. is sometimes followed by interphase

Subtopic:  Cell Cycle: Meiosis I |
 55%
From NCERT
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The centrioles replicate during:
1. G1 phase
2. S phase
3. G2 phase
4. Early prophase

Subtopic:  Intro to Cell Cycle & Interphase |
 77%
From NCERT
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Bivalent chromosomes clearly appear as tetrads during:

1. Zygotene

2. Pachytene

3. Diplotene

4. Diakinesis

Subtopic:  Cell Cycle: Meiosis I |
 66%
From NCERT
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The beginning of diplotene is recognized by:

1. appearance of recombination nodules
2. crossing over
3. dissolution of synaptonemal complex
4. appearance of chiasmata

Subtopic:  Cell Cycle: Meiosis I |
 70%
From NCERT
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Consider the given two statements:

l. During G1 phase the cell is metabolically active and continuously grows but does not replicate its DNA.

ll. During G2 phase, proteins are synthesized in preparation for mitosis while cell growth continues.

Of the two statements:
1. Only l is correct
2. Only ll is correct
3. Both l and ll are correct
4. Both l and ll are incorrect 

Subtopic:  Intro to Cell Cycle & Interphase |
 88%
From NCERT
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If the DNA content of an onion tip cell is 2C at the end of the M-phase, what would be its DNA content at the end of the S-phase?

1. C

2. 2C

3. 3C

4. 4C

Subtopic:  Intro to Cell Cycle & Interphase |
 80%
From NCERT
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