Amino Acid Structure and Properties
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Questions and Answers

What is the purpose of treating an amino acid solution with neutral formaldehyde?

  • To form a methylene compound, allowing titration with standard alkali (correct)
  • To react with the amino group to form a lactam
  • To denature proteins
  • To eliminate the carboxyl group's reactivity
  • What is the condition required for the reaction with ninhydrin to occur?

  • Presence of a free carboxyl group and a free amino group (correct)
  • Presence of a free hydroxyl group
  • Presence of a peptide linkage
  • Absence of a free amino group
  • What is the product of deamination by oxidation?

  • A lactam and carbon dioxide
  • A peptide linkage and water
  • A ketone acid and ammonia (correct)
  • An amine and an acid
  • What type of compound is formed when a γ-amino acid loses a molecule of water?

    <p>A lactam</p> Signup and view all the answers

    How does Fischer describe the linkage between amino acids in a protein molecule?

    <p>Peptide bond</p> Signup and view all the answers

    What can be calculated using the molecular weights of proteins and amino acids?

    <p>The number of amino acids in a protein</p> Signup and view all the answers

    What is the average molecular weight of proteins?

    <p>38,000</p> Signup and view all the answers

    What is the average number of amino acids in a protein of average molecular weight?

    <p>288</p> Signup and view all the answers

    Apart from NH2 and COOH, what do amino acids also contain?

    <p>Other reactive groups</p> Signup and view all the answers

    What is the term for a compound formed by the condensation of two amino acids?

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

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