AMINO ACID METABOLISM QUIZ

A best described ketogenic amino acid is

lysine

valine

none of these

tryptophan

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An example of a transamination process is

glutamate = hexanoic acid + NH3

aspartate + hexanoic acid = glutamate + oxaloacetate

glutamate = α-ketoglutarate + NH3

aspartate + α ketoglutarate = glutamate + oxaloacetate

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A ketogenic amino acid is one which degrades to

pyruvate or citric acid cycle intermediates

keto-sugars

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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A person with phenylketonuria cannot convert

phenylalanine to tyrosine

phenylalanine to isoleucine

phenol into ketones

phenylalanine to lysine

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Transaminase enzymes are present in

none of these

liver

pancreas

intestine

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Tyrosine is degraded to acetoacetyl CoA and fumarate and is described as a

ketogenic amino acid

glucogenic amino acid

ketogenic and glucogenic amino acid

keto-gluco amino acid

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Histidine is degraded to α-ketoglutarate and is described as a

keto-gluco amino acid

glucogenic amino acid

ketogenic amino acid

gluco amino acid

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The most toxic compounds is

tyrosine

phenylpyruvate

phenylalanine

lysine

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A person with phenylketonuria will convert

phenylpyruvate to phenylalanine

phenylalanine to isoleucine

tyrosine to phenylalanine

phenylalanine to phenylpyruvate

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Transamination is the transfer of an amino

acid to a carboxylic acid plus ammonia

group from an amino acid to a carboxylic acid

group from an amino acid to a keto acid

acid to a keto acid plus ammonia

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