Amino Acids and Genetic Code Quiz
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Questions and Answers

What functional groups are present in amino acids?

  • Amino and carboxyl (correct)
  • Sulfhydryl and phosphate
  • Aldehyde and ketone
  • Hydroxyl and carbonyl
  • How many amino acids are commonly found as constituents of mammalian proteins?

  • 50
  • 200
  • 20 (correct)
  • 100
  • What type of amino group does proline have?

  • Primary amino group
  • Tertiary amino group
  • Secondary amino group (correct)
  • Quaternary amino group
  • At physiologic pH, what is the charge on the carboxyl group of amino acids?

    <p>Negatively charged carboxylate ion (–COO–)</p> Signup and view all the answers

    How are amino acids classified according to their properties?

    <p>By the nature of their side chains (-R group)</p> Signup and view all the answers

    Which functional group in amino acids is considered acidic in nature?

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

    How many different amino acids are commonly found as constituents of mammalian proteins?

    <p>Exactly 20</p> Signup and view all the answers

    What type of amino group does proline have?

    <p>Secondary amino group</p> Signup and view all the answers

    At physiologic pH (pH= 7.4), what form do the amino acids mostly exist in?

    <p>Dipolar ion form</p> Signup and view all the answers

    What plays a role in classifying amino acids according to the properties of their side chains?

    <p>Side chain (-R group)</p> Signup and view all the answers

    Study Notes

    Amino Acid Structure and Properties

    • Amino acids possess both amino and carboxyl functional groups.
    • There are 20 amino acids commonly found as constituents of mammalian proteins.

    Amino Group Characteristics

    • Proline has a secondary amino group.
    • The amino group is basic in nature.

    Carboxyl Group Characteristics

    • At physiologic pH (pH= 7.4), the carboxyl group has a negative charge.

    Classification of Amino Acids

    • Amino acids are classified according to their properties, including the properties of their side chains.
    • Hydrophobicity and charge of the side chains play a role in classifying amino acids.

    pH and Amino Acid Form

    • At physiologic pH (pH= 7.4), amino acids mostly exist in their zwitterionic form.

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    Quiz Team

    Description

    Test your knowledge about the structures, classification, and genetic code of amino acids in medical biochemistry. Dr. Ahmed Ghdhban Al-Ziaydi PhD. provides insights into this fundamental topic.

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