MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following hydrolyzes successive amino-terminal residues from short peptides? |
| A. | Aminopeptidase |
| B. | Enteropeptidase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» B. Enteropeptidase | |
| 2. |
Trypsinogen is converted to its active state by ___________ |
| A. | Enteropeptidase |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» B. Glutaminase | |
| 3. |
Which of the following operates at an important intersection of carbon and nitrogen metabolism? |
| A. | Amino transferases |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» E. | |
| 4. |
Glutamine is converted to glutamate and NH4+ by ___________ |
| A. | Amino transferases |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» C. Glutamine synthase | |
| 5. |
The combined action of aminotransferase and glutamate dehydrogenase is referred as ___________ |
| A. | Oxidative deamination |
| B. | Transamination |
| C. | Reductive deamination |
| D. | Transdeamination |
| Answer» E. | |
| 6. |
Which is the first step in the catabolism of most L-amino acids once they have reached the liver is promoted? |
| A. | Amino transferases |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» B. Glutaminase | |
| 7. |
What is the necessary coenzyme for transamination reactions? |
| A. | Pyridoxal phosphate |
| B. | Thiamine pyrophosphate |
| C. | NAD |
| D. | Coenzyme A |
| Answer» B. Thiamine pyrophosphate | |
| 8. |
Pyridoxal phosphate and its aminate form, pyridoxamine phosphate are tightly bound coenzymes of ___________ |
| A. | Amino transferases |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» B. Glutaminase | |
| 9. |
Free ammonia combined with glutamate to yield glutamine by the action of ___________ |
| A. | Glutaminase |
| B. | Glutamine synthase |
| C. | Glutamate dehydrogenase |
| D. | Amino transferase |
| Answer» C. Glutamate dehydrogenase | |
| 10. |
Glutamate is metabolically converted to α-ketoglutarate and NH4+ by a process ___________ |
| A. | Oxidative deamination |
| B. | Transamination |
| C. | Reductive deamination |
| D. | Deamination |
| Answer» B. Transamination | |
| 11. |
TRYPSINOGEN_IS_CONVERTED_TO_ITS_ACTIVE_STATE_BY?$ |
| A. | Enteropeptidase |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» B. Glutaminase | |
| 12. |
Which_of_the_following_hydrolyzes_successive_amino-terminal_residues_from_short_peptides? |
| A. | Aminopeptidase |
| B. | Enteropeptidase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» B. Enteropeptidase | |
| 13. |
Which of the following operates at an important intersection of carbon and nitrogen metabolism? |
| A. | Amino transferases |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» E. | |
| 14. |
Glutamine is converted to glutamate and NH4+ by |
| A. | Amino transferases |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» C. Glutamine synthase | |
| 15. |
The combined action of aminotransferase and glutamate dehydrogenase is referred as |
| A. | Oxidative deamination |
| B. | Transamination |
| C. | Reductive deamination |
| D. | Transdeamination |
| Answer» E. | |
| 16. |
The first step in the catabolism of most L-amino acids once they have reached the liver is promoted by |
| A. | Amino transferases |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» B. Glutaminase | |
| 17. |
The necessary coenzyme for transamination reactions is |
| A. | Pyridoxal phosphate |
| B. | Thiamine pyrophosphate |
| C. | NAD |
| D. | Coenzyme A |
| Answer» B. Thiamine pyrophosphate | |
| 18. |
Pyridoxal phosphate and its aminate form, pyridoxamine phosphate are tightly bound coenzymes of |
| A. | Amino transferases |
| B. | Glutaminase |
| C. | Glutamine synthase |
| D. | Glutamate dehydrogenase |
| Answer» B. Glutaminase | |
| 19. |
Free ammonia combined with glutamate to yield glutamine by the action of |
| A. | Glutaminase |
| B. | Glutamine synthase |
| C. | Glutamate dehydrogenase |
| D. | Amino transferase |
| Answer» C. Glutamate dehydrogenase | |
| 20. |
Glutamate is metabolically converted to α-ketoglutarate and NH4+ by a process |
| A. | Oxidative deamination |
| B. | Transamination |
| C. | Reductive deamination |
| D. | Deamination |
| Answer» B. Transamination | |