Q. No.Spindle fibres attach on to:
1. Kinetosome of the chromosome
2. Telomere of the chromosome
3. Kinetochore of the chromosome
4. Centromere of the chromosome
1. Kinetosome of the chromosome
2. Telomere of the chromosome
3. Kinetochore of the chromosome
4. Centromere of the chromosome
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A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in
| 1. | Polyteny | 2. | Aneuploidy |
| 3. | Polyploidy | 4. | Somaclonal variation |
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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
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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