Q. No.The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of mitosis, if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after the S phase?
| 1. | 4 | 2. | 32 |
| 3. | 8 | 4. | 16 |
Identify the human cell for which the interphase period lasts the entire life of a person.
| 1. | Hepatocyte | 2. | Bone marrow stem cells |
| 3. | Epidermal cell | 4. | Neuron |
Match the following events that occur in their respective phases of cell cycle and select the correct option
| (a) | G1 phase | (i) | Cell grows and organelle duplication |
| (b) | S phase | (ii) | DNA replication and chromosome duplication |
| (c) | G2 phase | (iii) | Cytoplasmic growth |
| (d) | Metaphase in M-phase | (iv) | Alignment of chromosomes |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (i) | (ii) | (iii) | (iv) |
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?
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Some dividing cells exit the cell cycle and enter the vegetative inactive stage. This is called the quiescent stage G0. This process occurs at the end of:
| 1. | G1 phase | 2. | S phase |
| 3. | G2 phase | 4. | M phase |
Identify the correct statement with regard to phase (Gap 1) of interphase.
| 1. | The reorganisation of all cell components takes place. |
| 2. | The cell is metabolically active, grows but does not replicate its DNA |
| 3. | Nuclear division takes place |
| 4. | DNA synthesis or replication takes place. |
| 1. | The chromosome number and DNA content remain 2N and 2C respectively |
| 2. | The chromosome number and DNA content are 4N and 2C respectively |
| 3. | The chromosome number and DNA content are 2N and 4C respectively |
| 4. | The chromosome number and DNA content are 4N and 4C respectively |
A point in the animal cell cycle, at which the cell becomes "committed" to the cell cycle, occurs in:
| 1. | G1 phase | 2. | S phase |
| 3. | G2 phase | 4. | M phase |
Consider the following two statements:
| I: | The growth of multi-cellular organisms is due to mitosis. |
| II: | Mitosis results in the production of diploid daughter cells with identical genetic complement usually. |
Of the two statements:
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct but II is incorrect |
| 4. | I is incorrect but II is correct |
What is the number of phases in the cell cycle of a typical eukaryotic cell?
| 1. | 4 | 2. | 5 |
| 3. | 3 | 4. | 2 |
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