The enzyme recombinase is required at which stage of meiosis:
1. | Pachytene | 2. | Zygotene |
3. | Diplotene | 4. | Diakinesis |
The complex formed by a pair of synapsed homologous chromosomes is called:
1. Kinetochore
2. Bivalent
3. Axoneme
4. Equatorial plate
During gamete formation, the enzyme recombinase participates during:
1. Metaphase-I
2. Anaphase-II
3. Prophase-I
4. Prophase-II
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
1. Prophase-I during meiosis
2. Prophase-II during meiosis
3. Prophase of mitosis
4. Both prophase and metaphase of mitosis
1. | Chromatids start moving towards opposite poles in telophase. |
2. | Golgi complex and endoplasmic reticulum are still visible at the end of prophase. |
3. | Chromosomes move to the spindle equator and get aligned along the equatorial plate in metaphase. |
4. | Chromatids separate but remain in the center of the cell in anaphase. |
During mitosis ER and nucleolus begin to disappear at:
1. late prophase
2. early metaphase
3. late metaphase
4. early prophase
Which stages of cell division do the following figures A and B represent respectively?
1. | Metaphase- Telophase | 2. | Telophase- Metaphase |
3. | Late anaphase- Prophase | 4. | Prophase- Anaphase |
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?
1. | B-Metaphase | 2. | C-Karyokinesis |
3. | D-Synthetic phase | 4. | A-Cytokinesis |
Synapsis occurs between:
1. | a male and a female gamete |
2. | mRNA and ribosomes |
3. | spindle fibres and centromere |
4. | two homologous chromosomes |
In the 'S' phase of the cell cycle:
1. | amount of DNA doubles in each cell. |
2. | amount of DNA remains the same in each cell |
3. | chromosome number is increased |
4. | amount of DNA is reduced to half in each cell. |