Amino Acid Metabolism

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

A:

fumarate

B:

tyrosine

C:

lysine

D:

phenylpuruvate

Answer: B

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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

Answer: C

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A person with phenylketonuria will convert

A:

phenylalanine to phenylpyruvate

B:

phenylalanine to isoleucine

C:

phenylpyruvate to phenylalanine

D:

tyrosine to phenylalanine

Answer: A

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Transaminase enzymes are present in

A:

liver

B:

pancreas

C:

intestine

D:

none of these

Answer: A

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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: C

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Questions for: Amino Acid Metabolism