Class XI & XII · Biology practice
Botany PYQs Check your understanding, bookmark questions and revisit your mistakes.
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408 questions in this collection · Page 18 of 41
Biomolecules
Which one of the following is the most abundant
protein in the animals?
A Haemoglobin B Collagen C Lectin D Insulin
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Biomolecules
Identify the substances having glycosidic bond and
peptide bond, respectively in their structure:
A Chitin, cholesterol B Glycerol, trypsin C Cellulose, lecithin D Inulin, insulin
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Biomolecules
Identify the basic amino acid from the following.
A Tyrosine B Glutamic Acid C Lysine D Valine
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Biomolecules
Match the following:
(A)Inhibitor of catalytic activity
(I)Ricin
(B)Possess peptide bonds
(II)Malonate
(C)Cell wall material in fungi
(III)Chitin
(D)Secondary metabolite
(IV)Collagen
Choose the correct option from the following:
A (A)-(II), (B)-(IV), (C)-(III), (D)-(I) B (A)-(III), (B)-(I), (C)-(IV), (D)-(II) C (A)-(III), (B)-(IV), (C)-(I), (D)-(II) D (A)-(II), (B)-(III), (C)-(I), (D)-(IV)
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Biomolecules
Match the following:
List-I
List-II
(A)Aquaporin
(I)Amide
(B)Asparagine
(II)Polysaccharide
(C)Abscisic acid
(III)Polypeptide
(D)Chitin
(IV)Carotenoids
Select the correct option:
A (A)-(III), (B)-(I), (C)-(IV), (D)-(II) B (A)-(II), (B)-(III), (C)-(IV), (D)-(I) C (A)-(II), (B)-(I), (C)-(IV), (D)-(III) D (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
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Cell Cycle And Cell Division
Attachment of spindle fibers to kinetochores of
chromosomes becomes evident in:
A Anaphase B Telophase C Prophase D Metaphase
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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
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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)
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Cell Cycle And Cell Division
During Meiosis 1, in which stage synapsis takes place?
A Pachytene B Zygotene C Diplotene D Leptotene
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Cell Cycle And Cell Division
Identify the correct statement with regard to
G1 phase (Gap 1) of interphase.
A DNA synthesis or replication takes place. B Reorganisation of all cell components takes place. C Cell is metabolically active, grows but does not replicate its DNA. D Nuclear Division takes place.
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