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Home Biochemistry Amino Acid Metabolism Comments

  • Question
  • A person with phenylketonuria cannot convert


  • Options
  • A. phenylalanine to tyrosine
  • B. phenylalanine to isoleucine
  • C. phenol into ketones
  • D. phenylalanine to lysine

  • Correct Answer
  • phenylalanine to tyrosine 


  • Amino Acid Metabolism problems


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    • 1. Lysine is degraded to acetoacetyl CoA and is described as a

    • Options
    • A. ketogenic amino acid
    • B. glucogenic amino acid
    • C. keto-gluco amino acid
    • D. none of these
    • Discuss
    • 2. Transamination is the process where

    • Options
    • A. carboxyl group is transferred from amino acid
    • B. ?-amino group is removed from the amino acid
    • C. polymerisation of amino acid takes place
    • D. none of the above
    • Discuss
    • 3. A person suffering from phenylketonuria on consumption food containing high phenylalanine may lead to the accumulation of

    • Options
    • A. phenylalanine
    • B. phenylpyruvate
    • C. tyrosine
    • D. isoleucine
    • Discuss
    • 4. A person with phenylketonuria will convert

    • Options
    • A. phenylalanine to phenylpyruvate
    • B. phenylalanine to isoleucine
    • C. phenylpyruvate to phenylalanine
    • D. tyrosine to phenylalanine
    • Discuss
    • 5. Transamination is the transfer of an amino

    • Options
    • A. acid to a carboxylic acid plus ammonia
    • B. group from an amino acid to a keto acid
    • C. acid to a keto acid plus ammonia
    • D. group from an amino acid to a carboxylic acid
    • Discuss
    • 6. In the normal breakdown of phenylalanine, it is initially degraded to

    • Options
    • A. fumarate
    • B. tyrosine
    • C. lysine
    • D. phenylpuruvate
    • Discuss
    • 7. Which of the following amino acids is considered as both ketogenic and glucogenic?

    • Options
    • A. Valine
    • B. Tryptophan
    • C. Lysine
    • D. None of these
    • Discuss
    • 8. Transaminase enzymes are present in

    • Options
    • A. liver
    • B. pancreas
    • C. intestine
    • D. none of these
    • Discuss
    • 9. An example of the oxidative deamination is

    • Options
    • A. glutamate = hexanoic acid + NH3
    • B. aspartate + ?-ketoglutarate = glutamate + oxaloacetate
    • C. glutamate = ?-ketoglutarate + NH3
    • D. aspartate + hexanoic acid = glutamate + Oxaloacetate
    • Discuss
    • 10. Oxidative deamination is the conversion of an amino

    • Options
    • A. group from an amino acid to a keto acid
    • B. acid to a carboxylic acid plus ammonia
    • C. acid to a keto acid plus ammonia
    • D. group from an amino acid to a carboxylic acid
    • Discuss


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