DNA replication takes place during
1. –phase
2. –phase
3. S–phase
4. Prophase
| 1. | G2 Phase | 2. | S Phase |
| 3. | M Phase | 4. | G0 Phase |
Correct sequence of stages in cell cycle is
1. G, S, G, M
2. G, G, S, M
3, M, S, G, G
4. G, G, M, S
| 1. | About 50% | 2. | About 75% |
| 3. | More than 95% | 4. | Less than 50% |
| 1. | only one hour | 2. | about six hours |
| 3. | nearly 10 hours | 4. | almost 20 hours |
The following diagram refers to a typical cell cycle.
Identify the parts marked as X, Y and Z.

| 1. | X - G1; Y - S; Z - G2 |
| 2. | X - G2; Y - S; Z - G1 |
| 3. | X - G0; Y - S; Z - G2 |
| 4. | X - G1; Y - G2; Z - G0 |
| I: | The M Phase represents the phase when the actual cell division takes place. |
| II: | The interphase represents the phase between two successive M phases. |
| III: | Cell division proper lasts for only about 50% of the duration of the cell cycle. |
| IV: | The interphase lasts for about 50% of the duration of cell cycle. |
| 1. | Only I and II are correct |
| 2. | Only III and IV are correct |
| 3. | Only I and III are correct |
| 4. | Only II and IV are correct |
The number of chromosomes in phase is 36, the number of chromosomes in S phase is
1. 36
2. 18
3. 22
4. 37
Yeast can progress through the cell cycle in about
1. 90 sec
2. 90 min
3. 90 hrs
4. 90 yrs
| Column I | Column II | ||
| 1 | G1 phase | A | DNA replication |
| 2 | S phase | B | Mitosis |
| 3 | G2 phase | C | Cell growth and preparation for DNA synthesis |
| 4 | M phase | D | Preparation for mitosis |