MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which among the following species have not been transformed? |
| A. | Bacillus |
| B. | Neisseria |
| C. | Rhizobium |
| D. | Aspergillus |
| Answer» E. | |
| 2. |
In Griffith’s experiment which of the following strains of pneumococci was isolated from dead mice? |
| A. | live rough cells |
| B. | dead rough cells |
| C. | live smooth cells |
| D. | dead smooth cells |
| Answer» D. dead smooth cells | |
| 3. |
THE_DNA_UPTAKE_PROCESS_DOES_NOT_REQUIRE_ANY_ENERGY.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
IN_WHICH_PHASE_OF_GROWTH_DOES_THE_RECIPIENT_CELL_TAKES_UP_THE_DONOR_DNA??$ |
| A. | lag phase |
| B. | early logarithmic phage |
| C. | late logarithmic phage |
| D. | stationary phage |
| Answer» D. stationary phage | |
| 5. |
Which among the following species have not been transformed? |
| A. | Bacillus |
| B. | Neisseria |
| C. | Rhizobium |
| D. | Aspergillus |
| Answer» E. | |
| 6. |
Which of the following enzymes acts on the DNA after its entry into the cell? |
| A. | ligases |
| B. | endonucleases |
| C. | deoxyribonucleases |
| D. | exonucleases |
| Answer» D. exonucleases | |
| 7. |
How many DNA molecules are transferred after each transformation? |
| A. | 2 |
| B. | 1 |
| C. | 50 |
| D. | infinite |
| Answer» C. 50 | |
| 8. |
What should be the minimum weight of DNA that is required for successful transformation? |
| A. | 1000 daltons |
| B. | 100,000 daltons |
| C. | 300,000 daltons |
| D. | 8 million daltons |
| Answer» D. 8 million daltons | |
| 9. |
We require cell-free DNA for transformation to take place. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the following things was identified as the transforming principle? |
| A. | DNA |
| B. | RNA |
| C. | Proteins |
| D. | Carbohydrates |
| Answer» B. RNA | |
| 11. |
In Griffith’s experiment which of the following strains of pneumococci was isolated from dead mice?$ |
| A. | live rough cells |
| B. | dead rough cells |
| C. | live smooth cells |
| D. | dead smooth cells |
| Answer» D. dead smooth cells | |
| 12. |
What are the characteristics of rough pneumococci strain? |
| A. | noncapsulated and pathogenic |
| B. | noncapsulated and nonpathogenic |
| C. | capsulated and pathogenic |
| D. | capsulated and nonpathogenic |
| Answer» C. capsulated and pathogenic | |