Clinical Chemistry 1: Proteins Characteristics
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Questions and Answers

What is the percentage of nitrogen content in proteins?

  • 20%
  • 16% (correct)
  • 25%
  • 10%

    • What type of bonding occurs between the CO and NH groups of peptide bonds in secondary structure?

  • Van der Waals forces
  • Hydrogen bonds (correct)
  • Covalent bonds
  • Disulfide linkages

    • Which end of a protein structure has a free amino group?

  • C-terminal
  • Alpha helix
  • Beta sheet
  • N-terminal (correct)

    • What is the primary structure of proteins?

    <p>The sequence of amino acids linked through covalent peptide bonds</p> Signup and view all the answers

    What is the result of the interaction between the R groups of amino acids in tertiary structure?

    <p>Folding of the polypeptide chain into a three-dimensional structure</p> Signup and view all the answers

    What is the quaternary structure of proteins?

    <p>The binding of two or more polypeptide chains</p> Signup and view all the answers

    What is the main characteristic of globular proteins?

    <p>Symmetrical, compactly folded polypeptide chains</p> Signup and view all the answers

    Which type of protein has a carbohydrate prosthetic group?

    <p>Glycoproteins and Mucoproteins</p> Signup and view all the answers

    What is one of the functions of proteins in the body?

    <p>Energy production</p> Signup and view all the answers

    What is the role of proteins in maintaining colloidal osmotic pressure?

    <p>Water distribution</p> Signup and view all the answers

    What is the function of the ionizable R groups of amino acids in proteins?

    <p>Buffering capacity</p> Signup and view all the answers

    What is the function of proteins that bind to hormones, free hemoglobin, lipids, drugs, and calcium?

    <p>Transportation of molecules</p> Signup and view all the answers

    What is the primary function of antibodies in the human body?

    <p>To protect the body against 'foreign' invaders</p> Signup and view all the answers

    What type of proteins function as receptors for hormones?

    <p>Cellular proteins</p> Signup and view all the answers

    Which hormone is an example of a protein hormone?

    <p>Adrenocorticotropic hormone (ACTH)</p> Signup and view all the answers

    What is collagen an example of?

    <p>A structural protein</p> Signup and view all the answers

    Where are most plasma proteins synthesized?

    <p>The liver</p> Signup and view all the answers

    What is the byproduct of amino acid deamination during protein degradation?

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

    What is the result of peptide bond formation?

    <p>Protein synthesis</p> Signup and view all the answers

    What is the primary function of enzymes?

    <p>To catalyze chemical reactions</p> Signup and view all the answers

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