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Home Biochemistry Amino Acid Metabolism Comments

  • Question
  • An example of a transamination process is


  • Options
  • A. glutamate = hexanoic acid + NH3
  • B. aspartate + hexanoic acid = glutamate + oxaloacetate
  • C. aspartate + ? ketoglutarate = glutamate + oxaloacetate
  • D. glutamate = ?-ketoglutarate + NH3

  • Correct Answer
  • aspartate + ? ketoglutarate = glutamate + oxaloacetate 


  • Amino Acid Metabolism problems


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    • 1. A ketogenic amino acid is one which degrades to

    • Options
    • A. keto-sugars
    • B. either acetyl CoA or acetoacetyl CoA
    • C. pyruvate or citric acid cycle intermediates
    • D. multiple intermediates including pyruvate or citric acid cycle intermediates and acetyl CoA or acetoacetyl CoA
    • Discuss
    • 2. A person with phenylketonuria is advised not to consume which of the following products?

    • Options
    • A. Glycine containing foods
    • B. Fat containing food
    • C. Glucose
    • D. Aspartame
    • Discuss
    • 3. Carbon fixation requires the expenditure of ATP molecules which is generated by

    • Options
    • A. formation of glucose during the Calvin cycle
    • B. replenishment of chlorophyll
    • C. ETS (electron transfer system) during the light reactions
    • D. none of the above
    • Discuss
    • 4. The electrons that are released by the splitting of water during photosynthesis ultimately end up in

    • Options
    • A. ATP
    • B. O2
    • C. NADPH
    • D. rubisco
    • Discuss
    • 5. Which of the following is the reduced form of a temporary electron carrier molecule?

    • Options
    • A. FADH2
    • B. ATP
    • C. NADP+
    • D. CO2
    • Discuss
    • 6. Histidine is degraded to ?-ketoglutarate and is described as a

    • Options
    • A. gluco amino acid
    • B. glucogenic amino acid
    • C. ketogenic amino acid
    • D. keto-gluco amino acid
    • Discuss
    • 7. Which of the following is the best described glucogenic amino acid?

    • Options
    • A. Lysine
    • B. Tryptophan
    • C. Valine
    • D. None of these
    • Discuss
    • 8. A glucogenic amino acid is one which is degraded to

    • Options
    • A. keto-sugars
    • B. either acetyl CoA or acetoacetyl CoA
    • C. pyruvate or citric acid cycle intermediates
    • D. none of the above
    • Discuss
    • 9. A best described ketogenic amino acid is

    • Options
    • A. lysine
    • B. tryptophan
    • C. valine
    • D. none of these
    • Discuss
    • 10. 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


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