Q. No.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 reformation of the nuclear envelope during M-phase of the cell cycle?
| 1. | Decondensation from chromosomes and reassembly of the nuclear lamina |
| 2. | Transcription from chromosomes and reassembly of the nuclear lamina |
| 3. | Formation of the contractile ring and formation of the phragmoplast |
| 4. | Formation of the contractile ring and transcription from chromosomes. |
During mitosis ER and nucleolus begin to disappear at.
| 1. | late prophase |
| 2. | early metaphase |
| 3. | late metaphase |
| 4. | early prophase |
Best stage to observe shape, size and number of chromosomes is
1. interphase
2. metaphase
3. prophase
4. telophase
Synapsis occurs between
1. a male and a female gamete
2. mRNA and ribosomes
3. spindle fibres and centromere
4. two homologous chromosomes
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
1. 21
2. 42
3. 63
4. 84
During cell division, the spindle fibres attach to the chromosomes at a region called
| 1. | chromocentre | 2. | kinetochore |
| 3. | centriole | 4. | chromomere |
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. 5 x 105 cells
2. 35 x 105 cells
3. 32 x 105 cells
4. 174 x 105 cells
A bivalent consists of
| 1. | two chromatids and one centromere |
| 2. | two chromatids and two centromeres |
| 3. | four chromatids and two centromeres |
| 4. | four chromatids and four centromeres |
Meiosis has evolutionary significance because it results in
| 1. | genetically similar daughters |
| 2. | four daughter cells |
| 3. | eggs and sperms |
| 4. | recombinations |
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