MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Molecular Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Transformation, transduction and conjugation occur in every bacterial cell. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
What is the strain of the Hfr+ cell where the F factor is integrated near the tbr and leu loci? |
| A. | Hfr H |
| B. | Hfr A |
| C. | Hfr B |
| D. | Hfr K |
| Answer» B. Hfr A | |
| 3. |
High frequency recombination cell contains an integrated F factor. What is the name of such a cell? |
| A. | Har cell |
| B. | Hra cell |
| C. | Hfr cell |
| D. | Hrf cell |
| Answer» D. Hrf cell | |
| 4. |
By which of the following methods does the F plasmid integrates into the bacterial genome? |
| A. | Transformation |
| B. | Conjugation |
| C. | Recombination |
| D. | Mutation |
| Answer» D. Mutation | |
| 5. |
In how many states the F plasmid can occur within bacteria? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 6. |
What is the size of the F factor that is involved in conjugation? |
| A. | 106 base pairs |
| B. | 105 base pairs |
| C. | 10-12 base pairs |
| D. | 109 base pairs |
| Answer» C. 10-12 base pairs | |
| 7. |
During conjugation the Donor cell have cell surface appendages known as ____________ |
| A. | F pili |
| B. | B pili |
| C. | A pili |
| D. | D pili |
| Answer» B. B pili | |
| 8. |
Transformation of E. coli does not occur. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
What is the percentage of DNA molecules taken up by competent cells during the transformation? |
| A. | 0.1-0.5 |
| B. | 0.3-0.4 |
| C. | 0.5-0.6 |
| D. | 0.2-0.5 |
| Answer» E. | |
| 10. |
In which bacteria competence pheromones was first identified? |
| A. | S. pneumoniae |
| B. | B. subtilis |
| C. | H. influenzae |
| D. | N. gonorrbacae |
| Answer» C. H. influenzae | |
| 11. |
In which phase bacteria develop competence? |
| A. | Late phase |
| B. | Log phase |
| C. | Metaphase |
| D. | Lag phase |
| Answer» B. Log phase | |