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BMSC 230: FINAL (100% ACCURATE
ANSWERS)
Question : What is a glucogenic amino acid?
Correct answer: - amino acids that are catabolized to pyruvate or
an intermediate of the TCA cycle
can be used for glucose synthesis
Question : What is a ketogenic amino acid?
Correct answer: - amino acids that are catabolized to acetyl CoA
or acetoacetate
cannot give rise to the net synthesis of glucose but rather lead to the formation of fatty acids, ketone bodies, or their precursors
Question : Which amino acids are exclusively ketogenic?
Correct answer: - leucine
lysine
Question : Which amino acids are both ketogenic & glucogenic?
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Correct answer: - isoleucine
phenylalanine
tryptophane
tyrosine
threonine
Question : What amino acids are converted to pyruvate?
Correct answer: - alanine
cysteine
serine
glycine
threonine
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tryptophan
Question : Enzyme for threonine > glycine
Correct answer: Threonine dehydrogenase
Question : Enzyme for glycine > serine
Correct answer: Serine hydroxymethyl transferase
Question : Enzyme for serine > pyruvate
Correct answer: Serine dehydratase
Question : Enzyme for alanine > pyruvate
Correct answer: Alanine aminotransferase
Question : Enzyme for glutamate + pyruvate ↔ alanine + a-
ketoglutarate
Correct answer: Alanine aminotransferase (ALT)
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Question : Enzyme for glutamate + oxaloacetate ↔ aspartate +
a-ketoglutarate
Correct answer: Aspartate aminotransferase (AST)
Question : How can serine & threonine be directly deaminated
to pyruvate + NH4 & a-ketobutyrate + NH4?
Correct answer: Serine dehydratase & threonine dehydratase
Question : What are the coenzymes for the direct deamination of
serine & threonine dehydratase?
Correct answer: - pyridoxal
phosphate
PLP
Question : What two amino acids are converted to oxaloacetate?
Correct answer: - asparagine
aspartate