Class XI · Biology practice
Cell Cycle and Cell Division PYQs Check your understanding, bookmark questions and revisit your mistakes.
Enable JavaScript to check answers and save progress. Stored explanations remain available below.
34 questions in this collection · Page 2 of 4
Cell Cycle And Cell Division
Regarding Meiosis, which of the statements is incorrect?
A DNA replication occurs in S phase of Meiosis-II B Pairing of homologous chromosomes and recombination occurs in Meiosis-I C Four haploid cells are formed at the end of
Meiosis-II D There are two stages in Meiosis, Meiosis-I and II
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Cell Cycle And Cell Division
Which of the following stages of meiosis involves
division of centromere?
A Metaphase I B Metaphase II C Anaphase II D Telophase II
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Cell Cycle And Cell Division
Match List-I with List-II.
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
Choose the correct answer from the options given below:
A A-IV, B-II, C-III, D-I, B A-IV, B-I, C-II, D-III, C A-II, B-IV, C-III, D-I, D A-III, B-II, C-I, D-IV,
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Cell Cycle And Cell Division
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?
A 8 B 16 C 4 D 32
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Cell Cycle And Cell Division
Which stage of meiotic prophase shows
terminalisation of chiasmata as its distinctive feature?
A Leptotene B Zygotene C Diakinesis D Pachytene
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Cell Cycle And Cell Division
The centriole undergoes duplication during:
A S-phase B Prophase C Metaphase D G2 phase
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Cell Cycle And Cell Division
Attachment of spindle fibers to kinetochores of
chromosomes becomes evident in:
A Anaphase B Telophase C Prophase D Metaphase
Show explanation
Bookmark
Try again
AI-generated explanation. Check against your textbook.
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.”
Cell Cycle And Cell Division
In a mitotic cycle, the correct sequence of phases is:
A S, G1 , G2 , M B G1 , S, G2 , M C M, G1 , G2 , S D G1 , G2 , S, M
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Cell Cycle And Cell Division
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
A (A)-(II), (B)-(III), (C)-(IV), (D)-(I) B (A)-(III), (B)-(IV), (C)-(I), (D)-(II) C (A)-(IV), (B)-(I), (C)-(II), (D)-(III) D (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Cell Cycle And Cell Division
During Meiosis 1, in which stage synapsis takes place?
A Pachytene B Zygotene C Diplotene D Leptotene
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Page score: 0/40