| Assertion (A): | A piece of DNA, if needed to be propagated during recombinant DNA procedures, requires a vector. |
| Reason (R): | The vectors provide the origin of replication. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
| 1. | would not be able to multiply itself in the progeny cells of the organism. |
| 2. | would be transcribed but the transcript will not be translated. |
| 3. | would express as different proteins from the organism it was derived from. |
| 4. | would be invariably destroyed by the cytosolic endonucleases in eukaryotic cells. |
| 1. | |
| 2. | |
| 3. | |
| 4. |
| I: | Plasmid |
| II: | Phage DNA |
| Assertion (A): | In order to force bacteria to take up the plasmid, the bacterial cells must first be made ‘competent’ to take up DNA. |
| Reason (R): | All bacterial cells already have plasmids and will not normally pick up another. |
| 1. | Both (A) and (R) are True and (R) correctly explains the (A). |
| 2. | (A) is True; (R) is False |
| 3. | (A) is False; (R) is False |
| 4. | Both (A) and (R) are True but (R) does not correctly explain the (A) |
| Statement I: | There is a need for the recombinant DNA to be expressed in heterologous host. |
| Statement II: | In almost all recombinant technologies, the ultimate aim is to produce a desirable protein. |
| Assertion (A): | In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. |
| Reason (R): | Presence of more than one recognition sites within the vector will generate several fragments, which will complicate the gene cloning. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True; (R) is False |
| 3. | (A) is False; (R) is False |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |