Match the following Column-I with Column-II.
Column-I | Column-II | ||
A. | Synapsis aligns homologous chromosomes | (i) | Anaphase II |
B. | Synthesis of RNA and protein | (ii) | Zygotene |
C. | Action of enzyme recombinase | (iii) | G2 - phase |
D. | Centromeres do not separate, but chromatids move towards opposite poles | (iv) | Anaphase I |
(v) | Pachytene |
1. A-(ii), B-(i), C-(iii), D-(iv)
2. A-(ii), B-(iii), C-(v), D-(iv)
3. A-(i), B-(ii), C-(v), D-(iv)
4. A-(ii), B-(iii), C-(iv), D-(v)
A somatic cell that has just completed the S-phase of its cell cycle, as compared to a gamete of the same species has:
1. | twice the number of chromosomes and twice the amount of DNA |
2. | the same number of chromosomes but twice the amount of DNA |
3. | twice the number of chromosomes and four times the amount of DNA |
4. | four times the number of chromosomes and twice the amount of DNA |
During which phase(s) of the cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is denoted as 2C:
1. | G0 and G1 | 2. | G1 and S |
3. | Only G2 | 4. | G2 and M |
In the 'S' phase of the cell cycle:
1. | amount of DNA doubles in each cell. |
2. | amount of DNA remains the same in each cell |
3. | chromosome number is increased |
4. | amount of DNA is reduced to half in each cell. |
Given below is a schematic break-up of the phases/stages of cell cycle-
Which one of the following is the correct indication of the stage/phase in the cell cycle?
1. | B-Metaphase | 2. | C-Karyokinesis |
3. | D-Synthetic phase | 4. | A-Cytokinesis |