| I: | Gametes contain half the number of chromosomes found in somatic cells. |
| II: | Somatic cells have the diploid number of chromosomes. |
| III: | The haploid number of chromosomes in humans is 23. |
| IV: | The diploid number of chromosomes in humans is 23 pairs. |
The Mitotic phase of a typical eukaryotic cell is divided into:
| 1. | Two stages | 2. | Three stages |
| 3. | Four stages | 4. | Five stages |
| 1. | Skin epithelial cell | 2. | Neuron |
| 3. | Fibroblast | 4. | Phagocytes |
| 1. | The interphase lasts more than 95% of the duration of the cell cycle. |
| 2. | M phase starts with the nuclear division. |
| 3. | Interphase is the resting stage in the cell cycle where the cell is metabolically inactive. |
| 4. | Neurons in human body are permanently in G0 phase of the cell cycle. |
| 1. | interkinesis and there is no replication of DNA during this stage. |
| 2. | interkinesis and there is replication of DNA during this stage. |
| 3. | interphase II and there is no replication of DNA during this stage. |
| 4. | interphase II and there is replication of DNA during this stage. |
| Assertion (A): | Meiosis is the mechanism by which conservation of specific chromosome number of each species is achieved across generations in sexually reproducing organisms. |
| Reason (R): | Cells in G0 stage no longer remain metabolically active and no longer proliferate unless called on to do so depending on the requirement of the organism. |
| 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 |
| Statement I: | With few exceptions, in animals, mitotic cell division is generally only seen in the diploid somatic cells. |
| Statement II: | The plants can show mitotic divisions in both haploid and diploid cells. |
| 1. | Statement I is incorrect; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is correct; Statement II is correct |
| I: | organism to organism |
| II: | from cell type to cell type in the same organism |
| Assertion (A): | Plants continue to grow all their lives. |
| Reason (R): | All cells in a plant divide all the time. |
| 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. |
| I: | corresponds to the interval between initiation of mitosis and DNA replication. |
| II: | is characterised by a metabolically active cell that grows continuously and replicates its DNA. |