Spindle fiber unites with which structure of chromosomes:
1. Chromocenter
2. Chromomere
3. Kinetochore
4. Centriole
If a diploid cell is treated with colchicine then it becomes:
1. Triploid
2. Tetraploid
3. Diploid
4. Monoploid
Which one of the following precedes the reformation of the nuclear envelope during the M phase of the cell cycle:
1. | Decondensation from chromosomes and reassembly of the nuclear lamina |
2. | Formation of the contractile ring and formation of the phragmoplast |
3. | Formation of the contractile ring and transcription from chromosomes |
4. | Transcription from chromosomes and reassembly of the nuclear lamina |
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
Centromere is required for:
1. Movement of chromosomes toward poles
2. Cytoplasmic cleavage
3. Crossing over
4. Transcription