Cell Biology MCQ Questions & Answers

31

A metacentric chromosomes will appear at anaphase as

A) L- shaped B) W-shaped C) V-shaped D) Y-shaped

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Answer & Solution

Answer: Option D

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32

Histone proteins are synthesized in

A) M-phase B) S-phase C) G₁ phase D) G₂-phase

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Answer & Solution

Answer: Option B

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33

Determine the correctness or otherwise of the following Assertion [A] and the Reason [R] regarding mammalian cells.
Assertion [A]: Cells use Ca²⁺ and not Na⁺, for cell to-cell signaling.
Reason [R]: In the cytosol, concentration of Na⁺ is lower than that of Ca²⁺

A) Both [A] and [R] are true and [R] is the correct reason for [A] B) Both [A] and [R] are true but [R] is not the correct reason for [A] C) Both [A] and [R] are false D) [A] is true but [R] is false

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Answer & Solution

Answer: Option D

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34

Smooth endoplasmic reticulum synthesizes

A) Carbohydrates B) Proteins C) Steroids and lipids D) All the above

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Answer & Solution

Answer: Option C

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35

DNA synthesis in eukaryotes occurs during which phase of the mitotic cell cycle?

A) M B) G₁ C) S D) G₀

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Answer & Solution

Answer: Option C

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36

Which one of the following statements regarding G proteins is incorrect?

A) GDP is bound to G protein in the resting stage B) GTP bound α subunit cannot reassemble with by dimer C) All G proteins are trimeric D) Activation of G protein may result in activation or inhibition of the target enzymes

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Answer & Solution

Answer: Option C

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37

If serum is removed from the growth medium of human embryonic kidney cell line (HEK), then the cells will

A) Proliferate faster B) Proliferate normally C) Undergo cell cycle arrest D) Undergo immediate apoptosis

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Answer & Solution

Answer: Option C

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38

Fusicoccin promotes cotyledon growth by promoting

A) Cell division B) Cell wall biosynthesis C) Tonoplast acidification D) Cell wall acidification

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Answer & Solution

Answer: Option D

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39

In eukaryotic cell, DNA replication takes place during

A) S-phase B) G₁-phase C) G₂-phase D) M-phase

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Answer & Solution

Answer: Option A

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40

Primary neutransmitter that playa role in sleep, appetite, arousal and mood is

A) Serotonin B) Acetylcholine C) Octopamine D) Glutamate

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Answer & Solution

Answer: Option A

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Cell Biology MCQ Questions &amp; Answers | Biotechnology

Cell Biology MCQ Questions & Answers | Biotechnology