Protein Macromolecules Overview
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Questions and Answers

What is the main function of amino acids in living organisms?

  • Serving as a source of energy
  • Acting as building blocks for proteins (correct)
  • Facilitating photosynthesis
  • Storing genetic information
  • Which part of an amino acid is unique and varies among the 20 different types?

  • Hydrogen atom
  • R group (side chain) (correct)
  • Amino group
  • Carboxyl group
  • What type of carbon is the chiral center in an amino acid?

  • δ carbon
  • α carbon (correct)
  • γ carbon
  • β carbon
  • Why is glycine considered a unique amino acid among the 20 common types?

    <p>It has a second hydrogen atom instead of an R group</p> Signup and view all the answers

    Which functional group is attached to the α-carbon in amino acids?

    <p>Amino group</p> Signup and view all the answers

    Which type of amino acids are relatively nonpolar and hydrophobic?

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

    Which amino acid residues have the secondary amino (imino) group held in a rigid conformation?

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

    Which amino acid is an example of an imino acid with the -NH2 group bound in a ring structure?

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

    Which amino acid can form hydrogen bonds due to the presence of a hydroxyl group?

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

    Which class of amino acids includes phenylalanine, tyrosine, and tryptophan?

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

    Which type of amino acids are significantly more polar than phenylalanine?

    <p>Polar, uncharged</p> Signup and view all the answers

    Which amino acid is an example of a simple amino acid with a non-polar aliphatic R group?

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

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