Enzymes Chapter Outline Quiz
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Questions and Answers

What is the primary chemical nature of enzymes?

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

    • How many classes of enzymes are there based on the types of chemical reactions they catalyze?

  • 6 (correct)
  • 2
  • 8
  • 4

    • What is the purpose of using enzymes in clinical diagnosis, treatment, and research?

  • To slow down cellular reactions
  • To produce bread and alcoholic beverages
  • To study the properties of proteins
  • To detect and treat medical conditions (correct)

    • What is the primary structural feature of most enzymes?

    <p>They are globular proteins.</p> Signup and view all the answers

    Which of the following factors can affect enzyme activity?

    <p>All of the above</p> Signup and view all the answers

    What is the term used to describe the specific fit between an enzyme and its substrate?

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

    What type of enzyme contains both a protein and a nonprotein portion?

    <p>A conjugated enzyme</p> Signup and view all the answers

    Which of the following statements about apoenzymes is true?

    <p>An apoenzyme has both a protein and nonprotein part</p> Signup and view all the answers

    Which of the following substances is an enzyme based on its name?

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

    Which statement about an enzyme active site is true?

    <p>It always has a geometrical shape exactly complementary to that of the substrate</p> Signup and view all the answers

    Which type of enzyme contains a cofactor?

    <p>An enzyme in which a cofactor is present</p> Signup and view all the answers

    Which statement about apoenzymes is false?

    <p>An apoenzyme has both a protein and nonprotein part</p> Signup and view all the answers

    What is the term used to describe the relatively small part of an enzyme's structure that is actually involved in catalysis?

    <p>Enzyme active site</p> Signup and view all the answers

    Which model of enzyme action proposes that the active site has a flexible shape that can change to accept a variety of related substrates?

    <p>Induced-fit model</p> Signup and view all the answers

    Which type of enzyme specificity describes an enzyme that will catalyze only one reaction?

    <p>Absolute specificity</p> Signup and view all the answers

    How does the rate of enzyme activity change as temperature increases?

    <p>The rate increases until the protein is denatured, then drops sharply.</p> Signup and view all the answers

    What is the term used to describe the intermediate reaction species that is formed when a substrate binds to the active site of an enzyme?

    <p>Enzyme-substrate complex</p> Signup and view all the answers

    Which type of enzyme specificity describes an enzyme that will act on a particular type of chemical bond, irrespective of the rest of the molecular structure?

    <p>Linkage specificity</p> Signup and view all the answers

    What is the primary function of enzymes?

    <p>All of the above</p> Signup and view all the answers

    Which of the following statements about enzyme structure is correct?

    <p>Some enzymes are made of ribonucleic acids (RNA)</p> Signup and view all the answers

    What is a conjugated enzyme?

    <p>An enzyme that has a nonprotein part in addition to a protein part</p> Signup and view all the answers

    What is the role of the apoenzyme in a conjugated enzyme?

    <p>It is the protein part of the enzyme</p> Signup and view all the answers

    What is a holoenzyme?

    <p>The biochemically active conjugated enzyme produced from an apoenzyme and a cofactor</p> Signup and view all the answers

    Which of the following statements about enzyme specificity is correct?

    <p>Enzymes are highly specific to a type of reaction</p> Signup and view all the answers

    Which of the following is NOT a simple metal ion cofactor?

    <p>Coenzyme A (CoA)</p> Signup and view all the answers

    What is the role of the active site in an enzyme's structure?

    <p>To provide a pocket that holds specific substrates for reactions</p> Signup and view all the answers

    Which of the following coenzymes is NOT synthesized within the human body?

    <p>Coenzyme A (CoA)</p> Signup and view all the answers

    What does the suffix "-ase" indicate in an enzyme's name?

    <p>That the substance is an enzyme</p> Signup and view all the answers

    What happens after an enzyme has catalyzed a reaction?

    <p>The enzyme releases the finished products and continues working on more substrates</p> Signup and view all the answers

    Which of the following statements about enzyme nomenclature is NOT true?

    <p>The identity of the substrate is always noted in the enzyme's name</p> Signup and view all the answers

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