During cell division, the spindle fibres attach to the chromosomes at a region called

1. chromocentre

2. kinetochore

3. centriole

4. chromomere

Best stage to observe shape, size and number of chromosomes is

1. interphase

2. metaphase

3. prophase

4. telophase

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.

Mitotic anaphase differs from metaphase in possessing.

1. same number of chromosomes and same number of chromatids

2. half number of chromosomes and half number of chromatids

3. half number of chromosomes and same number of chromatids

4. same number of chromosomes and half number of chromatids