| Q.21 | In cell biology, what is a large double-membraned organelle that is sometimes referred to as the ‘central unit’ of the cell because it contains the chromosomes that bear genetic material? | |
| Ans | 1. Nucleus | |
| 2. Peroxisome | ||
| 3. Lysosome | ||
| 4. Mitochondrion |
Correct Ans: 1