MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Transaminase enzymes are present in |
| A. | liver |
| B. | pancreas |
| C. | intestine |
| D. | none of these |
| Answer» B. pancreas | |
| 2. |
Transamination is the transfer of an amino |
| A. | acid to a carboxylic acid plus ammonia |
| B. | group from an amino acid to a keto acid |
| C. | acid to a keto acid plus ammonia |
| D. | group from an amino acid to a carboxylic acid |
| Answer» C. acid to a keto acid plus ammonia | |
| 3. |
Lysine is degraded to acetoacetyl CoA and is described as a |
| A. | ketogenic amino acid |
| B. | glucogenic amino acid |
| C. | keto-gluco amino acid |
| D. | none of these |
| Answer» B. glucogenic amino acid | |
| 4. |
A ketogenic amino acid is one which degrades to |
| A. | keto-sugars |
| B. | either acetyl CoA or acetoacetyl CoA |
| C. | pyruvate or citric acid cycle intermediates |
| D. | multiple intermediates including pyruvate or citric acid cycle intermediates and acetyl CoA or acetoacetyl CoA |
| Answer» C. pyruvate or citric acid cycle intermediates | |
| 5. |
A best described ketogenic amino acid is |
| A. | lysine |
| B. | tryptophan |
| C. | valine |
| D. | none of these |
| Answer» B. tryptophan | |
| 6. |
A person with phenylketonuria will convert |
| A. | phenylalanine to phenylpyruvate |
| B. | phenylalanine to isoleucine |
| C. | phenylpyruvate to phenylalanine |
| D. | tyrosine to phenylalanine |
| Answer» B. phenylalanine to isoleucine | |
| 7. |
A person suffering from phenylketonuria on consumption food containing high phenylalanine may lead to the accumulation of |
| A. | phenylalanine |
| B. | phenylpyruvate |
| C. | tyrosine |
| D. | isoleucine |
| Answer» C. tyrosine | |
| 8. |
In the normal breakdown of phenylalanine, it is initially degraded to |
| A. | fumarate |
| B. | tyrosine |
| C. | lysine |
| D. | phenylpuruvate |
| Answer» C. lysine | |
| 9. |
Oxidative deamination is the conversion of an amino |
| A. | group from an amino acid to a keto acid |
| B. | acid to a carboxylic acid plus ammonia |
| C. | acid to a keto acid plus ammonia |
| D. | group from an amino acid to a carboxylic acid |
| Answer» D. group from an amino acid to a carboxylic acid | |
| 10. |
Transamination is the process where |
| A. | carboxyl group is transferred from amino acid |
| B. | -amino group is removed from the amino acid |
| C. | polymerisation of amino acid takes place |
| D. | none of the above |
| Answer» C. polymerisation of amino acid takes place | |
| 11. |
The most toxic compounds is |
| A. | tyrosine |
| B. | phenylpyruvate |
| C. | lysine |
| D. | phenylalanine |
| Answer» C. lysine | |
| 12. |
Histidine is degraded to -ketoglutarate and is described as a |
| A. | gluco amino acid |
| B. | glucogenic amino acid |
| C. | ketogenic amino acid |
| D. | keto-gluco amino acid |
| Answer» C. ketogenic amino acid | |
| 13. |
Which of the following amino acids is considered as both ketogenic and glucogenic? |
| A. | Valine |
| B. | Tryptophan |
| C. | Lysine |
| D. | None of these |
| Answer» C. Lysine | |
| 14. |
A glucogenic amino acid is one which is degraded to |
| A. | keto-sugars |
| B. | either acetyl CoA or acetoacetyl CoA |
| C. | pyruvate or citric acid cycle intermediates |
| D. | none of the above |
| Answer» D. none of the above | |
| 15. |
Which of the following is the best described glucogenic amino acid? |
| A. | Lysine |
| B. | Tryptophan |
| C. | Valine |
| D. | None of these |
| Answer» D. None of these | |
| 16. |
Tyrosine is degraded to acetoacetyl CoA and fumarate and is described as a |
| A. | glucogenic amino acid |
| B. | ketogenic amino acid |
| C. | ketogenic and glucogenic amino acid |
| D. | keto-gluco amino acid |
| Answer» D. keto-gluco amino acid | |
| 17. |
A person with phenylketonuria cannot convert |
| A. | phenylalanine to tyrosine |
| B. | phenylalanine to isoleucine |
| C. | phenol into ketones |
| D. | phenylalanine to lysine |
| Answer» B. phenylalanine to isoleucine | |
| 18. |
A person with phenylketonuria is advised not to consume which of the following products? |
| A. | Glycine containing foods |
| B. | Fat containing food |
| C. | Glucose |
| D. | Aspartame |
| Answer» E. | |