Q. No.
Which stage of meiotic prophase shows terminalisation of chiasmata as its distincitve feature?
1. Diakinesis
2. Pachytene
3. Leptotene
4. Zygotene
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
Match List-I with List-II
| List-I | List-II | ||
| (a) | S 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. | DNA replication |
Choose the correct answer from the options given below:
| Options: | (a) | (b) | (c) | (d) |
| 1. | iv | i | ii | iii |
| 2. | ii | iv | iii | i |
| 3. | iii | ii | i | iv |
| 4. | iv | ii | iii | i |
Which of the following stages of meiosis involves division of centromere?
1. Anaphase II
2. Telophase II
3. Metaphase I
4. Metaphase II
At which stage of the cell cycle does DNA replication occur:
1. G1 - phase
2. S - phase
3. G2 - phase
4. M - phase
The best material for the study of mitosis in the laboratory:
1. Anther
2. Root tip
3. Leaf tip
4. Ovary
Spindle fiber unites with which structure of chromosomes:
1. Chromocenter
2. Chromomere
3. Kinetochore
4. Centriole
If you are provided with the 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
Amount of cellular DNA increases during:
| 1. | Cytokinesis | 2. | Fertilisation |
| 3. | Mutation | 4. | Respiration |
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