Cell Cycle and Cell Division (last 10 years questions) Flashcards
- 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? (2021)
a. 16
b. 4
c. 32
d. 8
d. 8
- The centriole undergoes duplication during: (2021)
a. Prophase
b. Metaphase
c. G2 phase
d. S-phase
d. S-phase
- Match List-I with List-II (2021)
List-I List-II
A. S phase (i) Proteins 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
b. A-iv B-i C-ii D-iii
- Identify the correct statement with regard to G1 phase (Gap1) of interphase. (2020)
a. Reorganization of all cell components takes place.
b. Cell is metabolically active, grows but does not replicate its DNA.
c. Nuclear division takes place.
d. DNA synthesis or replication takes place.
b. Cell is metabolically active, grows but does not replicate its DNA.
- Some dividing cells exit the cell cycle and enter vegetative inactive stage.
This is called quiescent stage (G0). This process occurs at the end of: (2020)
a. G1 phase
b. S phase
c. G2 phase
d. M phase
a. G1 phase
- Match the following events that occur in their respective phases of cell cycle and select the correct option: (2020-Covid)
- G1 phase (i) Cell grows and organelle duplication
- S phase (ii) DNA replication and chromosome duplication
- G2 phase (iii) Cytoplasmic growth
- Metaphase in M-phase (iv) Alignment of chromosomes(1) (2) (3) (4)
a. (iii) (iv) (i) (ii)
b. (iv) (i) (ii) (iii)
c. (i) (ii) (iii) (iv)
d. (ii) (iii) (iv) (i)
c. (i) (ii) (iii) (iv)
- The correct sequence of phases of cell cycle is (2019)
a. M → G1 → G2 → S
b. G1 → G2 → S → M
c. S → G1 → G2 → M
d. G1 → S → G2 → M
d. G1 → S → G2 → M
- Cell in G0 phase (2019)
a. Exit the cell cycle
b. Enter the cell cycle
c. Suspend the cell cycle
d. Terminate the cell cycle
a. Exit the cell cycle
- DNA replication in bacteria occurs: (2017-Delhi)
a. During S-phase
b. Within nucleolus
c. Prior to fission
d. Just before transcription
c. Prior to fission
- When cell has stalled DNA replication fork, which checkpoint should be predominantly activated? [OS] (2016 - II)
a. M
b. Both G2/M and M
c. G1/S
d. G2/M
c. G1/S
- During cell growth, DNA synthesis takes place in: (2016 - II)
a. G2 phase
b. M phase
c. S phase
d. G1 phase
c. S phase
- A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has: (2015 Re)
a. Twice the number of chromosomes and four times the amount of DNA
b. Four times the number of chromosomes and twice the amount of DNA
c. Twice the number of chromosomes and twice the amount of DNA
d. Same number of chromosomes but twice the amount of DNA
a. Twice the number of chromosomes and four times the amount of DNA
- During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C? (2014)
a. G2 and M
b. G0 and G1
c. G1 and S
d. Only G2
d. Only G2
- In ‘S’ phase of the cell cycle: (2014)
a. Amount of DNA is reduced to half in each cell
b. Amount of DNA doubles in each cell
c. Amount of DNA remains same in each cell
d. Chromosome number is increased
b. Amount of DNA doubles in each cell
- Which one of the following never occurs during mitotic cell division? (2022)
a. Coiling and condensation of the chromatids
b. Spindle fibres attach to kinetochores of chromosomes
c. Movement of centrioles towards opposite poles
d. Pairing of homologous chromosomes
d. Pairing of homologous chromosomes