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Q. No.

The components of nuclear envelope are dismantled during:

1. prophase and reconstructed during telophase
2. prophase and reconstructed during anaphase
3. metaphase and reconstructed during telophase
4. metaphase and reconstructed during anaphase

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 85%
Level 1: 80%+
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Large protein complexes on the synaptonemal complex between two synapsed homologous chromosomes are called as:

1. Kinetochore 2. Chiasmata
3. Recombination nodules 4. Telomeres
Subtopic:  Cell Cycle: Meiosis I |
 68%
Level 2: 60%+
Hints

Match the following with respect to meiosis:

(a) Zygotene (i) Terminalization
(b) Pachytene (ii) Chiasmata
(c) Diplotene (iii) Crossing over
(d) Diakinesis (iv) Synapsis

Select the correct option from the following:

(a) (b) (c) (d)
1. (iv) (iii) (ii) (i)
2. (i) (ii) (iv) (iii)
3. (ii) (iv) (iii) (i)
4. (iii) (iv) (i) (ii)
Subtopic:  Cell Cycle: Meiosis I |
 84%
Level 1: 80%+
NEET - 2020
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Attachment of spindle fibers to kinetochores of chromosomes becomes evident in:

1. Anaphase 2. Telophase
3. Prophase 4. Metaphase
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 83%
Level 1: 80%+
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Please attempt this question first.

Consider the following two statements:

I: The growth of multi-cellular organisms is due to mitosis.
II: Mitosis results in the production of diploid daughter cells with identical genetic complement usually.
 

Of the two statements:

1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct

Subtopic:  Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) |
Level 3: 35%-60%
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During meiosis, the bivalent chromosomes clearly appear as tetrads first at:

1. Zygotene of Prophase I 2. Pachytene of Prophase I
3. Metaphase I 4. Anaphase I
Subtopic:  Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
 69%
Level 2: 60%+
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Consider the following statements regarding meiosis:

I: At metaphase I, the microtubules from the opposite poles of the spindle attach to the pair of homologous chromosomes.
II: At anaphase I, the homologous chromosomes separate, while sister chromatids remain associated with each other.

Of the two statements:

1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic:  Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
 87%
Level 1: 80%+
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The most important significance of meiosis is that:

1. It increases variations in the gene pool of the species that helps in evolution of that species.
2. It causes growth in the multicellular organisms.
3. It conserves specific number of chromosomes in each species across generations.
4. It is vital for repair and regeneration functions in the living organisms.
Subtopic:  Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
Level 3: 35%-60%
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The point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over is called:

1. Centromere 2. Centrosome
3. Chiasmata 4. Tetrad
Subtopic:  Cell Cycle: Meiosis I |
 86%
Level 1: 80%+
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A ribbon-like structure consisting of three protein components and extending across the region of synapsed chromosomes during the prophase of meiosis, is called:

1. Phragmoplast 2. Phragmosome
3. Synaptonemal complex 4. Recombination nodule
Subtopic:  Cell Cycle: Meiosis I |
 72%
Level 2: 60%+
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