MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
Binding of the large subunit to the small subunit triggers a cascade of reactions. Arrange them in order of their occurrence. |
| A. | ii, iv, i, iii |
| B. | iii, i, ii, iv |
| C. | iv, ii, i, iii |
| D. | i, iii, ii, ivView Answer |
| Answer» B. iii, i, ii, iv | |
| 2. |
When the large and small subunit of ribosome associate which of the following is not found within the complex? |
| A. | IF1 |
| B. | IF2 |
| C. | IF3 |
| D. | mRNA |
| Answer» D. mRNA | |
| 3. |
Which of the following is not the function of IF3? |
| A. | Binds to the small subunit |
| B. | Helps dissociate the 70S ribosome after translation |
| C. | Helps associate the large and small subunits during translation |
| D. | Blocks the binding of the charged tRNA molecule to the small subunit |
| Answer» D. Blocks the binding of the charged tRNA molecule to the small subunit | |
| 4. |
Which of the following is a GTPase? |
| A. | IF1 |
| B. | IF2 |
| C. | IF3 |
| D. | eIF1A |
| Answer» C. IF3 | |
| 5. |
Changing the positioning of the ribosome leads to the synthesis of different proteins. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
WHICH_OF_THE_FOLLOWING_IS_A_GTPASE??$ |
| A. | IF1 |
| B. | IF2 |
| C. | IF3 |
| D. | eIF1A |
| Answer» C. IF3 | |
| 7. |
When the large and small subunit of ribosome associate which of the following is not found within the complex?$ |
| A. | IF1 |
| B. | IF2 |
| C. | IF3 |
| D. | mRNA |
| Answer» D. mRNA | |
| 8. |
Which_of_the_following_is_not_the_function_of_IF3?$ |
| A. | Binds to the small subunit |
| B. | Helps dissociate the 70S ribosome after translation |
| C. | Helps associate the large and small subunits during translation |
| D. | Blocks the binding of the charged tRNA molecule to the small subunit |
| Answer» D. Blocks the binding of the charged tRNA molecule to the small subunit | |
| 9. |
How many translation initiation factors work hand in hand to initiate prokaryotic translation? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 10. |
Deformylase has a crucial role to play in the formation of mature polypeptide chains in prokaryotes. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
The first amino acid to be incorporated in the prokaryotic polypeptide is ____________ |
| A. | Methionine |
| B. | Valine |
| C. | N-formyl methionine |
| D. | N-acyl valine |
| Answer» D. N-acyl valine | |
| 12. |
The initiation of translation requires a special type of tRNA to bind to the ORF of the mRNA. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
In case of prokaryotes the first tRNA enters the ribosome in the ____________ |
| A. | A site |
| B. | P site |
| C. | E site |
| D. | Already attached to the mRNA before ribosome association |
| Answer» C. E site | |
| 14. |
What kind of interactions results in the binding of mRNA and the ribosome? |
| A. | Hydrophobic interaction |
| B. | Hydrophilic interaction |
| C. | Ionic interaction |
| D. | Hydrogen bonding |
| Answer» E. | |
| 15. |
Changing in the positioning of the ribosome leads to the synthesis of different proteins. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
For the translation to be initiated which of the following does not occur? |
| A. | Ribosome recruitment to the mRNA |
| B. | Positioning of ribosome on ‘GUG’ |
| C. | Addition of charged tRNA to the A site |
| D. | Binding of the large and small subunits of the ribosome |
| Answer» D. Binding of the large and small subunits of the ribosome | |