Q. No.The stage of mitosis at which morphology of chromosomes is most easily studied is the:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
1. Prophase
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Consider the following events:
I. Centromere split and chromatids separate.
II. Chromatids move to opposite poles
The stage of mitosis characterized by these two events is:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
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What stage of the cell division is shown in the following diagram of a cell undergoing cell division?
1. Prophase I
2. Prophase II
3. Telophase I
4. Telophase II
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Given below is the schematic representation of a typical cell cycle:
The duration of which of the stages shown is the diagram, according to you, is highly exaggerated with respect to other stages?
1. G1
2. G2
3. S
4. M
A bacterium divides every 35 minutes. If a culture containing 105 cells per mL is grown for 175 minutes, what will be the cell concentration per mL after 175 minutes ?
1. 175 × 105 cells
2. 85 × 105 cells
3. 35 × 105 cells
4. 32 × 105 cells
Best material for the study of mitosis in laboratory is
1. anther
2. root tip
3. leaf tip
4. ovary
In the somatic cell cycle:
| 1. | DNA replication takes place in S-phase |
| 2. | A short interphase is followed by a long mitotic phase |
| 3. | G2 phase follows mitotic phase |
| 4. | In G1 phase, DNA content is double the amount of DNA present in the original cell |
If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?
| 1. | Telophase | 2. | Anaphase |
| 3. | Prophase | 4. | Metaphase |
At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?
1. During telophase
2. During S-phase
3. During G2 stage of prophase
4. During entire prophase
Four healthy people in their 20s got involved in injuries resulting in damage and death of a few cells. Which of the following cells are least likely to be replaced by new cells ?
1. Osteocytes
2. Liver cells
3. Neurons
4. Malpighian layer of the skin
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