Amino Acids and Proteins
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Questions and Answers

What is the characteristic element of proteins?

  • Hydrogen
  • Oxygen
  • Nitrogen (correct)
  • Carbon

    • How many commonly occurring amino acids are there?

  • 10
  • 20 (correct)
  • 15
  • 25

    • What does the term 'alpha amino acids' refer to?

  • Amino acids with the amino group attached to the same carbon atom as the carboxyl group (correct)
  • Amino acids with a three-letter abbreviation
  • Amino acids with an imino group
  • Amino acids with a one-letter abbreviation

    • Which element is a minor constituent of proteins?

    <p>Sulfur (D)</p> Signup and view all the answers

    How much of the total dry body weight is made up of proteins?

    <p>Three quarters (C)</p> Signup and view all the answers

    Which type of amino acid group does not contain proline?

    <p>Heterocyclic (C)</p> Signup and view all the answers

    Which amino acid is not found in proteins?

    <p>Ornithine (B)</p> Signup and view all the answers

    Which type of amino acid group includes Phenylalanine, Tyrosine, and Tryptophan?

    <p>Aromatic (B)</p> Signup and view all the answers

    Which amino acid type comprises Valine, Leucine, and Isoleucine?

    <p>Aliphatic (D)</p> Signup and view all the answers

    Which amino acid type is known for its OH-Pro and OH-Lys variations found in proteins?

    <p>Hydroxy containing (A)</p> Signup and view all the answers

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