MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When the phage transduces only those bacterial genes adjacent to the prophage in the bacterial chromosome then it is known as? |
| A. | generalized transduction |
| B. | specialized transduction |
| C. | restricted transduction |
| D. | conjugation |
| Answer» D. conjugation | |
| 2. |
How many percent of thr+ transducing phages also carry leu+? |
| A. | 10% |
| B. | 5% |
| C. | 3% |
| D. | 15% |
| Answer» D. 15% | |
| 3. |
How much time is taken by the new DNA to make whole phage particles? |
| A. | 24 hours |
| B. | 60 mins |
| C. | 2 mins |
| D. | 10-20 mins |
| Answer» E. | |
| 4. |
HOW_MANY_PERCENT_OF_THR+_TRANSDUCING_PHAGES_ALSO_CARRY_LEU+??$ |
| A. | 10% |
| B. | 5% |
| C. | 3% |
| D. | 15% |
| Answer» D. 15% | |
| 5. |
When_the_phage_transduces_only_those_bacterial_genes_adjacent_to_the_prophage_in_the_bacterial_chromosome_then_it_is_known_as?$ |
| A. | generalized transduction |
| B. | specialized transduction |
| C. | restricted transduction |
| D. | conjugation |
| Answer» D. conjugation | |
| 6. |
What is the correct order when coliphage P1 is grown in a thr+ leu+ aziR host is used to infect a thr- leu- azi- recipient bacterial cell? |
| A. | thr<sup>+</sup> leu<sup>+</sup> azi<sup>R</sup> |
| B. | thr<sup>–</sup> leu<sup>+</sup> azi<sup>R</sup> |
| C. | thr<sup>+</sup> leu<sup>–</sup> azi<sup>R</sup> |
| D. | thr<sup>–</sup> leu<sup>–</sup> azi<sup>R</sup> |
| Answer» B. thr<sup>‚Äö√Ñ√∂‚àö√ë‚àö¬®</sup> leu<sup>+</sup> azi<sup>R</sup> | |
| 7. |
Fragments transferred by a bacteriophage contains how many genes? |
| A. | 20 |
| B. | 50 |
| C. | 1 |
| D. | 100 |
| Answer» E. | |
| 8. |
What is the frequency of defective phage particles in progeny phage produced? |
| A. | 100 |
| B. | 10<sup>-1</sup> |
| C. | 10<sup>-5</sup> |
| D. | 1000 |
| Answer» D. 1000 | |
| 9. |
The viral DNA may be incorporated into the phage head during phage assembly. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Which of the following role is performed by a bacteriophage in transduction? |
| A. | vector |
| B. | donor |
| C. | recipient |
| D. | episome |
| Answer» B. donor | |
| 11. |
Bacteriophages inject their nucleic acid into the bacterium. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
When viral genome can become integrated into the bacterial genome they are known as ____________ |
| A. | temperate phage |
| B. | prophage |
| C. | bacteriophage |
| D. | episome |
| Answer» C. bacteriophage | |
| 13. |
How much time is taken by the new DNA to make whole phage particles? |
| A. | 24 hours |
| B. | 60 mins |
| C. | 2 mins |
| D. | 10-20 mins |
| Answer» E. | |