Amino Acid Metabolism – Section 1

6. 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

Correct Answer: C. acid to a keto acid plus ammonia
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7. An example of a transamination process is

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

Correct Answer: C. aspartate + α ketoglutarate = glutamate + oxaloacetate
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8. Transamination is the process where

A. carboxyl group is transferred from amino acid
B. α-amino group is removed from the amino acid
C. polymerization of amino acid takes place
D. none of the above

Correct Answer: B. α-amino group is removed from the amino acid
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9. The most toxic compounds is

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

Correct Answer: B. phenylpyruvate
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10. 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

Correct Answer: D. Aspartame
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