Question 11 of 34
Regarding Meiosis, which of the statements is incorrect?
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Cell Cycle and Cell Division PYQs
Class XI Biology • NCERT Based • NEET Practice
Question 12 of 34
Which of the following stages of meiosis involves
division of centromere?
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Question 13 of 34
Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I | List-II |
|---|---|
| (A)S phase | (I)protein are synthesized |
| (B)G2 phase | (II)Inactive phase |
| (C)Quiescent stage | (III)Interval between mitosis and initiation of DNA replication |
| (D)G1 phase | (IV)DNA replication |
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Question 14 of 34
The fruit fly has 8 chromosomes (2n) in each cell.
During interphase of Mitosis if the number of
chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase?
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Question 15 of 34
Which stage of meiotic prophase shows
terminalisation of chiasmata as its distinctive feature?
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Question 16 of 34
The centriole undergoes duplication during:
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Question 17 of 34
Attachment of spindle fibers to kinetochores of
chromosomes becomes evident in:
Explanation:
In mitosis, the kinetochores on chromosomes attach to spindle microtubules as the chromosomes align. This attachment becomes evident when the chromosomes align at the middle of the cell, i.e., in metaphase, with kinetochores held on by spindle fibers from opposite poles. Thus, the visible connection between kinetochores and spindle fibers is most evident during metaphase of cell division, as per NCERT description.
🧠 Did You Know?Metaphase is characterized by chromosomes lining up at the equator, with kinetochores attached to microtubules from both poles.
💡 NCERT Memory Line:“Chromosomes move to the equator and become arranged at metaphase plate; spindle fibers attach to kinetochores.”
Question 18 of 34
In a mitotic cycle, the correct sequence of phases is:
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Question 19 of 34
Match the following events that occur in their respective phases of cell cycle and select the correct option:
| (A)G1 phase | (I)Cell grows and organelle duplication |
| (B)S phase | (II)DNA replication and chromosome duplication |
| (C)G2 phase | (III)Cytoplasmic growth |
| (D)Metaphase in M-phase | (IV)Alignment of chromosomes |
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Question 20 of 34
During Meiosis 1, in which stage synapsis takes place?
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