MCQOPTIONS
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MCQOPTIONS
This section includes 21 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. |
Consider a tandem repeat of the sequence GCU. Now if insertion of an A residue occurs in the message as follows What type of mutation has taken place in this case? |
| A. | Missense mutation |
| B. | Stop mutation |
| C. | Frame shift mutation |
| D. | Reverse mutation |
| Answer» D. Reverse mutation | |
| 2. |
Frame shift mutation can increase or decrease the length of a polypeptide. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Prenylation adds prenyl groups to the ___________ amino acid residues. |
| A. | Methionine |
| B. | Cystine |
| C. | Threonine |
| D. | Arginine |
| Answer» C. Threonine | |
| 4. |
How many types of modification are possible in eukaryotes by addition of lipids? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 5. |
Initiation of glycosylation occurs in the Golgi body. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
In O-linked glycoproteins, the carbohydrates may be attached to how many amino acids? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 7. |
In the N-linked glycoprotein, the carbohydrates are attached to which of the following bases? |
| A. | Valine |
| B. | Threonine |
| C. | Asparagine |
| D. | Serine |
| Answer» D. Serine | |
| 8. |
How many Proteolytic cleavages produce mature insulin? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 9. |
INITIATION_OF_GLYCOSYLATION_OCCURS_IN_THE_GOLGI_BODY.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Prenylation adds prenyl groups to the ___________ amino acid residues.$ |
| A. | Methionine |
| B. | Cystine |
| C. | Threonine |
| D. | Arginine |
| Answer» C. Threonine | |
| 11. |
How_many_types_of_modification_are_possible_in_eukaryotes_by_addition_of_lipids?$ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 12. |
If the insertions of three nucleotides occur in a consecutive manner it causes which of the following type of mutation? |
| A. | Missense mutation |
| B. | Stop mutation |
| C. | Frame shift mutation |
| D. | Reverse mutation |
| Answer» D. Reverse mutation | |
| 13. |
Frame_shift_mutation_can_increase_or_decrease_the_length_of_a_polypeptide. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
In O-linked glycoproteins the carbohydrates may be attached to how many amino acids? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 15. |
In the N-linked glycoprotein the carbohydrates are attached to which of the following bases? |
| A. | Valine |
| B. | Threonine |
| C. | Asparagine |
| D. | Serine |
| Answer» D. Serine | |
| 16. |
Glycosylation is the addition of ___________ to the protein. |
| A. | Carbohydrate |
| B. | Lipid |
| C. | Fat |
| D. | Minerals |
| Answer» B. Lipid | |
| 17. |
How many Proteolytic cleavages produce the mature insulin? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 18. |
The first step in protein targeting is ___________ |
| A. | Synthesis of protein |
| B. | Translocation to Golgi body |
| C. | Translocation to nucleus |
| D. | Translocation to ER |
| Answer» E. | |
| 19. |
The amino acid is the signal sequence in any polypeptide chain for ____________ |
| A. | Protein activity |
| B. | Glycosylation site |
| C. | Proteolytic site |
| D. | Site for lipid addition |
| Answer» D. Site for lipid addition | |
| 20. |
Proteolytic modifications of the polypeptide are an important process in the mechanism for protein sorting and transport. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
Which of the following is not a type of post translational modification? |
| A. | Proteolysis |
| B. | Protein folding |
| C. | Glycosylation |
| D. | Lipid addition |
| Answer» C. Glycosylation | |