Biochemistry Quiz: Amino Acids and Metabolism
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Questions and Answers

Which amino acid can be formed by hydroxylation of phenylalanine?

  • Tyrosine (correct)
  • Proline
  • Alanine
  • Glycine

    • Elevated homocysteine levels in the blood can be associated with a deficiency in which vitamin?

  • Vitamin B12 (correct)
  • Vitamin D
  • Vitamin A
  • Vitamin C

    • Which enzyme deficiency would have the greatest effect on protein digestion?

  • Pepsin
  • Amylase
  • Trypsin (correct)
  • Lipase

    • Which amino acid metabolism reduction can lead to elevated homocysteine levels?

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

    Which of the following is NOT part of the catecholamines family derived from tyrosine?

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

    Which citric acid cycle intermediate can participate in Heme Biosynthesis?

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

    Which of the following is NOT a function of glycoproteins?

    <p>Serving as antibodies</p> Signup and view all the answers

    In the urea cycle, which molecule is formed from citrulline when combined with aspartate?

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

    Which of the following best represents the function of argininosuccinate synthase in the urea cycle?

    <p>Cleavage of argininosuccinate to fumarate and arginine</p> Signup and view all the answers

    Which of the following is true about DNA polymerases in DNA synthesis?

    <p>They require an RNA primer for DNA synthesis</p> Signup and view all the answers

    Which of the following statements about hemoglobin is correct?

    <p>It contains iron linked to heme through cysteine</p> Signup and view all the answers

    Regarding heme catabolism, which process is involved in breaking down the porphyrin ring?

    <p>Oxidative cleavage</p> Signup and view all the answers

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