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?

    <p>Phosphopantothenoylcysteine decarboxylase</p> Signup and view all the answers

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

    <p>Flavin adenine dinucleotide (FAD)</p> Signup and view all the answers

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

    <p>Tryptophan</p> Signup and view all the answers

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

    <p>Removal of CO2 by phosphopantothenoylcysteine decarboxylase</p> Signup and view all the answers

    What is the product of the reaction catalyzed by flavokinase?

    <p>Riboflavin monophosphate</p> Signup and view all the answers

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

    <p>Tacking on to the molecule to form CoA</p> Signup and view all the answers

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

    <p>Tryptophan</p> Signup and view all the answers

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