MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Cell Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
PIWI proteins have been best studied in _________________ |
| A. | mice |
| B. | fruit flies |
| C. | nematodes |
| D. | maize |
| Answer» C. nematodes | |
| 2. |
Which type of RNAs suppress the movement of transposons in the germline? |
| A. | mRNAs |
| B. | piRNAs |
| C. | miRNAs |
| D. | tRNAs |
| Answer» C. miRNAs | |
| 3. |
Drosha is an ___________________ |
| A. | enzyme |
| B. | micro RNA |
| C. | messenger RNA |
| D. | satellite DNA |
| Answer» B. micro RNA | |
| 4. |
Micro RNAs participate in ______________ |
| A. | posttranslational modification |
| B. | posttranscriptional modification |
| C. | chromatin remodeling |
| D. | gene silencing |
| Answer» E. | |
| 5. |
Which of the following RNAs are highly conserved? |
| A. | let-1 |
| B. | pet-1 |
| C. | let-7 |
| D. | pet-7 |
| Answer» D. pet-7 | |
| 6. |
The first RNAi therapeutics was aimed at treating ______________________ |
| A. | muscular dystrophy |
| B. | macular degeneration |
| C. | multiple myeloma |
| D. | neurodegeneration |
| Answer» C. multiple myeloma | |
| 7. |
What takes place when siRNAs are used in place of dsRNA in mammalian cells? |
| A. | gene knock-down |
| B. | apoptosis |
| C. | necrosis |
| D. | aggregation |
| Answer» B. apoptosis | |
| 8. |
RNA interference is not observed in vertebrates. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Which family of proteins plays a key role in gene silencing pathways? |
| A. | Globulin |
| B. | Argonaute |
| C. | Intein-containing proteins |
| D. | Amino-acyl transferases |
| Answer» C. Intein-containing proteins | |
| 10. |
Dicer converts double-stranded RNAs into _______________ |
| A. | snRNA |
| B. | siRNA |
| C. | mRNA |
| D. | tRNA |
| Answer» C. mRNA | |
| 11. |
RNA interference is evolved as a genetic immune system. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
The phenomenon of RNA interference was discovered using the organism ___________________ |
| A. | Mus musculus |
| B. | Drosophila |
| C. | C. elegans |
| D. | Arabidopsis thaliana |
| Answer» D. Arabidopsis thaliana | |
| 13. |
The studies that led to discovery of posttranscriptional gene silencing phenomena were performed on ____________ |
| A. | petunia |
| B. | sunflower |
| C. | maize |
| D. | wheat |
| Answer» B. sunflower | |
| 14. |
When was it first discovered that RNA molecules are capable of catalyzing chemical reactions? |
| A. | 1962 |
| B. | 1972 |
| C. | 1982 |
| D. | 1992 |
| Answer» D. 1992 | |