Proteins and Their Functions Quiz
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Questions and Answers

What do proteins do in the form of enzymes, hormones, antibodies, and globulins?

  • Catalyze, regulate, and protect the body chemistry (correct)
  • Hold together, protect, and provide structure to the body
  • Transport oxygen and other natural α-amino acids
  • Effect the breakdown of amino acids

    • What is the primary structural unit of proteins?

  • Polypeptides (correct)
  • Globulins
  • Lipoproteins
  • Enzymes

    • How are dietary proteins related to essential amino acids?

  • Dietary proteins are not a source of essential amino acids
  • Dietary proteins inhibit the absorption of essential amino acids
  • Dietary proteins are the source of essential amino acids (correct)
  • Dietary proteins contain all amino acids except the essential ones

    • What is the meaning of the Greek word 'proteios' from which the term 'proteins' is derived?

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

    What is the result of boiling aqueous acid or base with proteins?

    <p>Yields an assortment of small molecules identified as α-aminocarboxylic acids</p> Signup and view all the answers

    How many types of amino acids make up a protein?

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

    Which type of amino acids can be obtained through our diet?

    <p>Essential amino acids</p> Signup and view all the answers

    What is the function of insulin?

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

    What bonds connect the amino group of one amino acid to the carboxyl group of the other amino acid in a protein chain?

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

    What is determined by the sequence of amino acids in the protein chain?

    <p>Primary Structure</p> Signup and view all the answers

    Which type of secondary structure has a right-handed coiled strand?

    <p>α-helix</p> Signup and view all the answers

    What type of bonding makes the α-helix structure especially stable?

    <p>Hydrogen bonds between the oxygen of each C=O bond and the hydrogen of each N-H group</p> Signup and view all the answers

    What type of tertiary structure shows specific local structural conformations dependent on hydrogen bonding?

    <p>ß-sheet</p> Signup and view all the answers

    What classifies proteins based on their sequence of amino acids in the chain?

    <p>Primary Structure</p> Signup and view all the answers

    Which structural conformation consists of pairs of strands lying side-by-side, with carbonyl oxygens in one strand bonding with the amino hydrogens of the adjacent strand?

    <p>ß-sheet</p> Signup and view all the answers

    What is the primary structural unit of proteins?

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

    What type of bonding makes the α-helix structure especially stable?

    <p>Hydrogen bonding</p> Signup and view all the answers

    What is determined by the sequence of amino acids in the protein chain?

    <p>Primary structure</p> Signup and view all the answers

    What is the result of boiling aqueous acid or base with proteins?

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

    What do proteins do in the form of hemoglobin, myoglobin, and various lipoproteins?

    <p>Effect the transport of oxygen and other substances</p> Signup and view all the answers

    How are dietary proteins related to essential amino acids?

    <p>Dietary proteins are the source of essential amino acids</p> Signup and view all the answers

    Which of the following types of proteins carries out the function of transporting nutrients across cell membranes?

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

    In which type of protein structure is the sequence of amino acids in the protein chain determined?

    <p>Primary Structure</p> Signup and view all the answers

    What type of bonding is responsible for making the α-helix structure especially stable?

    <p>Hydrogen Bonds</p> Signup and view all the answers

    Which type of secondary structure consists of pairs of strands lying side-by-side, with carbonyl oxygens in one strand bonding with the amino hydrogens of the adjacent strand?

    <p>ß-sheet</p> Signup and view all the answers

    Which amino acid conformation depends on hydrogen bonding and consists of right-handed coiled strands with stable hydrogen bonds?

    <p>α-helix</p> Signup and view all the answers

    What is the main function of insulin, a type of protein?

    <p>Hormone Regulation</p> Signup and view all the answers

    Which type of protein can fight infectious agents in living organisms?

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

    What determines the local structural conformations of proteins dependent on hydrogen bonding?

    <p>Secondary Structure</p> Signup and view all the answers

    What kind of bond connects the carboxyl group of one amino acid with the amino group of another amino acid in a protein chain?

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

    In what form do some proteins function as within living organisms?

    <p>Enzyme form</p> Signup and view all the answers

    What are proteins formed by and what type of bond connects their amino acids to each other?

    <p>Formed by amino acids; connected by peptide bonds</p> Signup and view all the answers

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