AMINO ACID METABOLISM QUIZ

Oxidative deamination is the conversion of an amino

group from an amino acid to a carboxylic acid

group from an amino acid to a keto acid

acid to a carboxylic acid plus ammonia

acid to a keto acid plus ammonia

TRUE ANSWER : ?
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Transaminase enzymes are present in

intestine

liver

pancreas

none of these

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A best described ketogenic amino acid is

tryptophan

valine

lysine

none of these

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Which of the following is the best described glucogenic amino acid?

Lysine

Valine

Tryptophan

None of these

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A person with phenylketonuria is advised not to consume which of the following products?

Aspartame

Fat containing food

Glycine containing foods

Glucose

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An example of a transamination process is

aspartate + α ketoglutarate = glutamate + oxaloacetate

glutamate = α-ketoglutarate + NH3

glutamate = hexanoic acid + NH3

aspartate + hexanoic acid = glutamate + oxaloacetate

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

phenylpuruvate

tyrosine

lysine

fumarate

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A person with phenylketonuria cannot convert

phenylalanine to isoleucine

phenylalanine to tyrosine

phenylalanine to lysine

phenol into ketones

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Transamination is the process where

polymerisation of amino acid takes place

α-amino group is removed from the amino acid

None of these

carboxyl group is transferred from amino acid

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A ketogenic amino acid is one which degrades to

keto-sugars

pyruvate or citric acid cycle intermediates

multiple intermediates including pyruvate or citric acid cycle intermediates and acetyl CoA or acetoacetyl CoA

either acetyl CoA or acetoacetyl CoA

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