Q. No.A typical eukaryotic cell cycle is illustrated by human cells in culture. These cells divide once in approximately every
1. 24 hours
2. 90 minutes
3. 20 minutes
4. 9 hours
1. 24 hours
2. 90 minutes
3. 20 minutes
4. 9 hours
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
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