Phases of the cell cycle and its checkpoints — practice questions

Question 1 · difficulty L3 · understanding

$$\text { Match List I with List II : }$$ List-I (Phase of cell cycle) List-II (Activity) A. $\mathrm{G}_1$ phase I. Actual cell division occurs B. S phase II. Cell is metabolically active and continuously grows but does not replicate its DNA C. $\mathrm{G}_2$ Phase III. Synthesis of DNA occurs and the amount of DNA per cell doubles D. M phase IV. Proteins are synthesized while cell growth continues Choose the correct answer from the options given below :

• A. A-IV, B-I, C-II, D-III
• B. A-I, B-II, C-III, D-IV
• C. A-III, B-IV, C-I, D-II
• D. A-II, B-III, C-IV, D-I

Question 2 · difficulty L3 · understanding

Match List-I with List-II : List - I List - II (A) Metacentric chromosome (I) Chromosome has a terminal centromere (B) Sub-metacentric chromosome (II) Middle centromere forming two equal arms of chromosome (C) Acrocentric chromosome (III) Centromere is slightly away from the middle of chromosome resulting into two unequal arms (D) Telocentric chromosome (IV) Centromere is situated close to its end forming one extremely short and one very long arm Choose the correct answer from the options given below:

• A. A-II, B-I, C-IV, D-III
• B. A-IV, B-I, C-II, D-III
• C. A-I, B-II, C-III, D-IV
• D. A-II, B-III, C-IV, D-I

Question 3 · difficulty L3 · understanding

Match List-I with List-II. List - I List - II (A) Cells are metabolically active and proliferate (I) G$$_2$$ phase (B) DNA replication takes place (II) G$$_1$$ phase (C) Proteins are synthesised (III) G$$_0$$ phase (D) Quiescent stage with metabolically active cells (IV) S phase Choose the correct answer from the options given below:

• A. A-IV, B-II, C-III, D-I
• B. A-I, B-III, C-IV, D-II
• C. A-I, B-I, C-III, D-IV
• D. A-II, B-IV, C-I, D-III

Question 4 · difficulty L3 · understanding

Following are the stages of cell division : A. Gap 2 phase B. Cytokinesis C. Synthesis phase D. Karyokinesis E. Gap 1 phase Choose the correct sequence of stages from the options given below :

• A. C-E-D-A-B
• B. E-B-D-A-C
• C. B-D-E-A-C
• D. E-C-A-D-B

Question 5 · difficulty L3 · understanding

Which one of the following is the quiescent stage of cell cycle?

• A. M
• B. G$$_2$$
• C. G$$_1$$
• D. G$$_0$$

Question 6 · difficulty L3 · understanding

Among eukaryotes, replication of DNA takes place in :

• A. S phase
• B. G 1 phase
• C. G 2 phase
• D. M phase

Question 7 · difficulty L3 · understanding

Match List I with List II: List I List II (A) M Phase (I) Proteins are synthesized (B) G$$_2$$ Phase (II) Inactive phase (C) Quiescent stage (III) Interval between mitosis and initiation of DNA replication (D) G$$_1$$ Phase (IV) Equational division Choose the correct answer from the options given below :

• A. A-IV, B-II, C-I, D-III
• B. A-IV, B-I, C-II, D-III
• C. A-II, B-IV, C-I, D-III
• D. A-III, B-II, C-IV, D-I

Question 8 · difficulty L3 · understanding

Given below are two statements: Statement I : During G 0 phase of cell cycle, the cell is metabolically inactive. Statement II : The centrosome undergoes duplication during S phase of interphase. In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement I and Statement II are incorrect.
• B. Statement I is correct but Statement II is incorrect.
• C. Statement I is incorrect but Statement II is correct.
• D. Both Statement I and Statement II are correct.

Question 9 · difficulty L3 · understanding

Which one of the following never occurs during mitotic cell division?

• A. Spindle fibres attach to kinetochores of chromosomes
• B. Movement of centrioles towards opposite poles
• C. Pairing of homologous chromosomes
• D. Coiling and condensation of the chromatids

Question 10 · difficulty L3 · understanding

Match List I with List II. List - I List - II (a) Metacentric chromosome (i) Centromere situated close to the end forming one extremely short and one very long arms (b) Acrocentric chromosome (ii) Centromere at the terminal end (c) Submetacentric (iii) Centromere in the middle forming two equal arms of chromosomes (d) Telocentric chromosome (iv) Centromere slightly away from the middle forming one shorter arm and one longer arm Choose the correct answer from the options given below:

• A. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
• B. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
• C. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
• D. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)