Proteins in Living Systems
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Proteins in Living Systems

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Questions and Answers

What is the common structural feature shared by all proteins?

  • Linear polymers of amino acids (correct)
  • Formation of immunoglobulins
  • Presence of collagen and calcium phosphate crystals
  • Presence of carboxyl and amino groups

    • Which class of molecules are essential for every life process?

  • Carbohydrates
  • Nucleic acids
  • Lipids
  • Proteins (correct)

    • What determines the role of an amino acid in a protein?

  • The presence of carboxyl groups
  • Its distinctive side chain (R group) (correct)
  • The number of hydrogen atoms it contains
  • Its location in the protein structure

    • How many standard amino acids are found in mammalian proteins?

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

    Which group of proteins fight infectious agents in the body?

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

    What type of organic molecules are amino acids?

    <p>Molecules possessing both carboxyl and amino groups</p> Signup and view all the answers

    What is the main function of contractile proteins?

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

    Which component of an amino acid determines its role in a protein?

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

    What is the distinctive feature of the side chain in amino acids?

    <p>It is unique for each amino acid</p> Signup and view all the answers

    Which class of molecules are essential for directing and regulating metabolism?

    <p>Polypeptide hormones</p> Signup and view all the answers

    What type of proteins are responsible for fighting infectious agents in the body?

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

    Which organic molecules possess both carboxyl and amino groups?

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

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