MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Binding of the prokaryotic DNA dependent RNA polymerase to promoter site is inhibited by ____________ |
| A. | Rifampicin |
| B. | Tetracycline |
| C. | Puromycin |
| D. | Streptomycin |
| Answer» B. Tetracycline | |
| 2. |
RNA primer is removed from the Okazaki fragment by ____________ |
| A. | DNA polymerase I |
| B. | DNA polymerase II |
| C. | DNA polymerase III |
| D. | RNA polymerase |
| Answer» B. DNA polymerase II | |
| 3. |
Repressors bind to ____________ |
| A. | Promoter |
| B. | Enhancer |
| C. | Operator |
| D. | Hormone response element |
| Answer» D. Hormone response element | |
| 4. |
Actinomycin D is an inhibitor of ____________ |
| A. | Transcription |
| B. | Translation |
| C. | Replication |
| D. | None of the mentioned |
| Answer» B. Translation | |
| 5. |
What is the role of sigma factor in bacterial RNA polymerase? |
| A. | Catalyzing RNA synthesis |
| B. | Positioning RNA polymerase correctly on the DNA template |
| C. | Terminating RNA synthesis |
| D. | Unwinding DNA template |
| Answer» C. Terminating RNA synthesis | |
| 6. |
Transcription is catalyzed by ____________ |
| A. | DNA-dependent RNA polymerases |
| B. | RNA-dependent DNA polymerases |
| C. | Reverse transcriptases |
| D. | DNA ligases |
| Answer» B. RNA-dependent DNA polymerases | |
| 7. |
RNA_PRIMER_IS_REMOVED_FROM_THE_OKAZAKI_FRAGMENT_BY?$ |
| A. | DNA polymerase I |
| B. | DNA polymerase II |
| C. | DNA polymerase III |
| D. | RNA polymerase |
| Answer» B. DNA polymerase II | |
| 8. |
Binding_of_the_prokaryotic_DNA_dependent_RNA_polymerase_to_promoter_site_is_inhibited_by$ |
| A. | Rifampicin |
| B. | Tetracycline |
| C. | Puromycin |
| D. | Streptomycin |
| Answer» B. Tetracycline | |
| 9. |
Repressors bind t? |
| A. | Promoter |
| B. | Enhancer |
| C. | Operator |
| D. | Hormone response element |
| Answer» D. Hormone response element | |
| 10. |
Number of hydrogen bonds that form between U and A in a Watson-Crick base pair interactions? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 11. |
Actinomycin D is an inhibitor of |
| A. | Transcription |
| B. | Translation |
| C. | Replication |
| D. | None |
| Answer» B. Translation | |
| 12. |
TBP stands for? |
| A. | TATA box polymerase |
| B. | TATA-box binding protein |
| C. | Transcription associated factor |
| D. | Transcription factor binding protein |
| Answer» C. Transcription associated factor | |
| 13. |
Role of sigma factor in bacterial RNA polymerase is |
| A. | Catalyzing RNA synthesis |
| B. | Positioning RNA polymerase correctly on the DNA template |
| C. | Terminating RNA synthesis |
| D. | Unwinding DNA template |
| Answer» C. Terminating RNA synthesis | |
| 14. |
Which of the following is true about RNA synthesis? |
| A. | Synthesis of RNA is always in the 5’ to 3’ direction |
| B. | RNA polymerase requires a primer for initiating transcription |
| C. | U is inserted opposite T in transcription |
| D. | New nucleotides are added on the 2’-OH of the ribose sugar |
| Answer» B. RNA polymerase requires a primer for initiating transcription | |
| 15. |
Where does RNA polymerase bind DNA? |
| A. | Promoter |
| B. | Operator |
| C. | Enhancer |
| D. | None |
| Answer» B. Operator | |
| 16. |
Transcription is catalyzed by |
| A. | DNA-dependent RNA polymerases |
| B. | RNA-dependent DNA polymerases |
| C. | Reverse transcriptases |
| D. | DNA ligases |
| Answer» B. RNA-dependent DNA polymerases | |