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Nucleotide Metabolism: Purines and Pyrimidines

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Nucleotide Metabolism: Purines and Pyrimidines

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Questions and Answers

What is the starting material for the synthesis of flavin nucleotides?

Pantothenate (vitamin B5)

Nicotinate

Tryptophan

Riboflavin (vitamin B2) (correct)

What is the role of glutamine in the synthesis of NAD+?

Activating the terminal ribose –OH group by phosphorylation

Removing CO2 from the molecule

Providing the amino group for amidation (correct)

Donating a carbon atom for the formation of the nucleotide

What is the source of the reactive sulfur in the synthesis of CoA?

Pantothenate (vitamin B5)

Riboflavin (vitamin B2)

Tryptophan

Cysteine (correct)

What is the enzyme responsible for the removal of CO2 in the synthesis of CoA?

Phosphopantothenoylcysteine decarboxylase Signup and view all the answers

What is the product of the reaction catalyzed by FAD pyrophosphorylase?

Flavin adenine dinucleotide (FAD) Signup and view all the answers

What is the starting material for the synthesis of NAD+?

Tryptophan Signup and view all the answers

What is the role of flavin cofactor in the synthesis of CoA?

Removal of CO2 by phosphopantothenoylcysteine decarboxylase Signup and view all the answers

What is the product of the reaction catalyzed by flavokinase?

Riboflavin monophosphate Signup and view all the answers

What is the role of AMP in the synthesis of CoA?

Tacking on to the molecule to form CoA Signup and view all the answers

What is the essential amino acid that is converted into nicotinate?