Quiz 3 Sp10 KEY - connective tissue and neurohormones(a...

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Quiz 3 Spring 2010 KEY Multiple Choice (2 pts each) 1. Select the correct statement(s) regarding the synthesis of α -ketoglutarate from glutamate. (a) Glutamate transaminase binds to pyridoxal phosphate (PLP) and glutamate (b) A Schiff base is formed between PLP and glutamate (c) Glutamate transaminase transfers the amino group from glutamate to PLP (d) α -ketoglutarate is formed which can serve as an acceptor of an amino group from PMP (e) All of the above 2. Which of the following statement(s) correctly describes the role of vitamin B6 in the synthesis of neurotransmitters? (a) PLP binds to dihydroxyphenylalanine (DOPA) decarboxylase which facilitates the decarboxylation of DOPA to form dopamine (b) PLP binds to glutamate which facilitates the deamination of glutamate to form gamma amino butyric acid (GABA) (c) PLP binds to tryptophan hydroxylase for the formation of 5-hydroxytryptophan in the serotonin synthesis pathway (e) none of the above 3. Select the correct statement(s) that describes how ascorbic acid functions in the formation of
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Unformatted text preview: connective tissue and neurohormones. (a) Functions as a coenzyme by binding to lysine hydroxylase and facilitating the hydroxylation of lysine (b) Reduces the copper cofactor required for dopamine ß-hydroxylase for the formation of norepinephrine (c) Reduces the iron cofactor required for the decarboxylation of 5-hydroxytryptophan for the formation of serotonin (d) All of the above (e) None of the above 4. Select the correct statements regarding the potential health consequences of pharmacological (grams/day) doses of vitamin C. (a) Gastrointestinal upset may result (b) May reduce the severity of cold symptoms (c) May increase the formation of oxalic acid in individuals with a history of kidney stones (d) Increased lung cancer risk (e) a, b, c only True or False (1 pt each) 5. The absorption of PLP from dietary sources involves the active transport of pyridoxal following dephosphorylation. (a) True (b) False 6. The RDA for an adult male smoker is 125 mg/day. (a) True (b) False...
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Quiz 3 Sp10 KEY - connective tissue and neurohormones(a...

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