List I | List II | ||
A. | M 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. | Equational division |
Choose the correct answer from the options given below:
Options: | A | B | C | D |
1. | II | IV | I | III |
2. | III | II | IV | I |
3. | IV | II | I | III |
4. | IV | I | II | III |
Assertion (A): | At the end of S phase, there is no increase in chromosome number in the cell. |
Reason (R): | During S phase, the amount of DNA per cell doubles. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
Cells in phase:
1. terminate the cell cycle
2. exit the cell cycle
3. enter the cell cycle
4. suspend the cell cycle
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.
I: | Growth and reproduction are characteristics of cells, indeed of all living organisms. |
II: | Although cell growth (in terms of cytoplasmic increase) is a continuous process, DNA synthesis occurs only during one specific stage in the cell cycle. |
III: | The interphase lasts more than 95% of the duration of cell cycle. |
IV: | During the G2 phase, proteins are synthesised in preparation for mitosis while cell growth continues. |
Assertion (A): | Cell division is a very important process in all living organisms. |
Reason (R): | During the division of a cell, DNA replication and cell growth also take place. |
1. | (A) is True; (R) is False |
2. | Both (A) and (R) are True and (R) correctly explains (A) |
3. | Both (A) and (R) are True but (R) does not correctly explain (A) |
4. | (A) is False; (R) is True |