Choose incorrect statement with respect to cell cycle
1. | Duration of cell cycle can vary from organism to organism |
2. | Duration of cell cycle is uniform in different cell types of an organism |
3. | Events of cell cycle are under genetic control |
4. | It is divided into two basic phases |
Choose the correct sequence with respect to different phases of cell cycle
1. | G1 S, G2, M |
2. | G1, G2, S, M |
3. | M, G2, G1, S |
4. | S, M, G2, G1 |
Human nerve cells do not divide after birth and they remain throughout their life in which phase of cell cycle?
1. | M-phase |
2. | G1 phase |
3. | G0 phase |
4. | Invisible phase |
Various phases of cell cycle are controlled by
1. | Cyclin proteins |
2. | Cyclin dependent protein kinases |
3. | Phosphorylation of cyclin dependent protein kinases |
4. | More than one option is correct |
Amount of DNA and Number of chromosomes in G2 phase of cell cycle would be
1. | Double and equal to that of in G1 phase respectively |
2. | Half and equal to that of in G1 phase respectively |
3. | Equal and half to that of in G1 phase respectively |
4. | Double and double to that of in G1 phase respectively |
Exchange of genetic material between non-sister chromatids of homologous chromosomes in pachytene stage is facilitated by
(1) Dynein
(2) Recombinase
(3) chiasmata
(4) Calmodulin
Plant cells do not divided their cytoplasm by forming a furrow in cell membrane like animal cells rather they divide by cell plate because
1. | Plant cell do not have centrioles |
2. | Cell wall formation beings with formation of cell plate |
3. | Cell plate represents middle lamella between the walls of two adjacent cells |
4. | Plant cells are enclosed by a relatively inextensible wall |
Which of the following number of cells can be expected from the human cell culture after 70hrs
1. 4
2. 8
3. Both 1 and 2
4. 2
Which of the following is a continuous process?
1. Cell growth (in terms of cytoplasmic increase)
2. Cell differentiation
3. DNA duplication
4. Cell division
Cell growth is a continuous process in terms of
1. Increase in protein content
2. Increase in DNA content
3. Increase in cytoplasmic content
4. Increase in RNA content