| A: | Messenger |
| B: | Structural role |
| C: | Adaptor molecule |
| D: | Catalytic role |
| E: | Genetic material in some viruses |
| Assertion (A): | In prokaryotes, control of the rate of translational initiation is the predominant site for control of gene expression. |
| Reason (R): | In prokaryotes, it is the metabolic, physiological or environmental conditions that regulate the expression of genes. |
| 1. | (A) is False but (R) is True. |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
The structure of the ribosome is made of:
| 1. | rRNA and Proteins |
| 2. | rRNA and Polysaccharides |
| 3. | mRNA, rRNA and tRNA |
| 4. | RNA, DNA and Proteins |