Amino Acid Metabolism – Section 1

11. 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

Show Answer

12. Transaminase enzymes are present in

A. liver
B. pancreas
C. intestine
D. none of these

Show Answer

13. A person with phenylketonuria will convert

A. phenylalanine to phenylpyruvate
B. phenylalanine to isoleucine
C. phenylpyruvate to phenylalanine
D. tyrosine to phenylalanine

Show Answer

14. An example of the oxidative deamination is

A. glutamate = hexanoic acid + NH₃
B. aspartate + α-ketoglutarate = glutamate + oxaloacetate
C. glutamate = α-ketoglutarate + NH₃
D. aspartate + hexanoic acid = glutamate + Oxaloacetate

Show Answer

15. In the normal breakdown of phenylalanine, it is initially degraded to

A. fumarate
B. tyrosine
C. lysine
D. phenylpyruvate

Show Answer