MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
Which of the following prevents the digestion of mRNA by exonucleases?a) methyl-guanosine capb) methylene bluec) poly( |
| A. | methyl-guanosine cap |
| B. | methylene blue |
| C. | poly(A) tail |
| D. | bromophenol blue |
| Answer» B. methylene blue | |
| 2. |
Which technique was used to find the relationship between 15S and 10S globin RNAs? |
| A. | S-loop formation |
| B. | R-loop formation |
| C. | Pulsed-field gel electrophoresis |
| D. | Polymerase chain reaction |
| Answer» C. Pulsed-field gel electrophoresis | |
| 3. |
Genes with intervening (non-coding) sequences are called ___________________ |
| A. | axons |
| B. | exons |
| C. | split genes |
| D. | jumping genes |
| Answer» D. jumping genes | |
| 4. |
Eukaryotic mRNAs have special modifications, not present in prokaryotic mRNAs. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Messenger RNAs are found in the ________________ |
| A. | nucleus |
| B. | cytoplasm |
| C. | nucleolus |
| D. | lysosome |
| Answer» C. nucleolus | |
| 6. |
The RNA polymerase engaged in transcription is ____________ |
| A. | acidic |
| B. | alkaline |
| C. | phosphorylated |
| D. | non-phosphorylated |
| Answer» D. non-phosphorylated | |
| 7. |
More than one RNA polymerase can attach to the promoter site. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which enzyme unwinds the DNA? |
| A. | helicase |
| B. | topoisomerase |
| C. | nuclease |
| D. | endonuclease |
| Answer» B. topoisomerase | |
| 9. |
TFIID is a ___________ |
| A. | protein complex |
| B. | rRNA |
| C. | endonuclease |
| D. | ribonuclease |
| Answer» B. rRNA | |
| 10. |
Which of the following gene encodes for the white of a chicken egg? |
| A. | ovalbumin |
| B. | globulin |
| C. | troponin |
| D. | dystrophin |
| Answer» B. globulin | |
| 11. |
All mRNA precursors are synthesized by ___________________ |
| A. | RNA polymerase I |
| B. | RNA polymerase II |
| C. | RNA polymerase III |
| D. | RNA polymerase IV |
| Answer» C. RNA polymerase III | |
| 12. |
Which of the following has the smallest half life? |
| A. | hnRNA |
| B. | mRNA |
| C. | tRNA |
| D. | siRNA |
| Answer» B. mRNA | |
| 13. |
Which of the following are precursors for mRNAs? |
| A. | snoRNA |
| B. | hnRNA |
| C. | siRNA |
| D. | tRNA |
| Answer» C. siRNA | |
| 14. |
The “S” in the 80S ribosomes stands for _______________ |
| A. | Svedberg’s units |
| B. | Sedimentation coefficient |
| C. | Sulphur-labeled |
| D. | Supersonic |
| Answer» B. Sedimentation coefficient | |
| 15. |
When were the first structures of ribosomal subunits made by scientists? |
| A. | 1980 |
| B. | 1990 |
| C. | 2000 |
| D. | 2010 |
| Answer» D. 2010 | |