Isoenzymes and Non-Competitive Inhibitors Quiz
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Questions and Answers

What is the term used to describe enzymes that catalyze the same type of reaction but are created by different genes and have different molecular shapes?

  • Proenzymes
  • Isoenzymes (correct)
  • Holoenzymes
  • Prosthetic enzymes
  • Which term refers to an enzyme that combines with only one substrate and catalyzes only the one corresponding reaction?

  • Proenzyme
  • Absolute Specificity (correct)
  • Group Specificity
  • Isoform
  • What is a coenzyme where a cofactor is bound tightly to an enzyme referred to as?

  • Prosthetic Group (correct)
  • Holoenzyme
  • Isoform
  • Isoenzyme
  • Which term describes the inactive form of an enzyme that needs to be activated?

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

    In the Enzyme Commission (EC) code number, which digits represent the subclass and sub-subclass of the enzyme?

    <p>Second and third digits</p> Signup and view all the answers

    What do you call an active system composed of a prosthetic group and an apoenzyme?

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

    What is the main difference between isoenzymes?

    <p>Varying molecular structure</p> Signup and view all the answers

    How do non-competitive inhibitors differ from competitive inhibitors?

    <p>They bind to areas other than the active site</p> Signup and view all the answers

    What is a characteristic of a non-competitive inhibitor?

    <p>Binds independently from the substrate</p> Signup and view all the answers

    How does storage at low temperatures affect enzymes?

    <p>Preserves enzyme activity reversibly</p> Signup and view all the answers

    What is a key aspect of fractionating isoenzymes?

    <p>Enhancing total enzyme activity</p> Signup and view all the answers

    Why is non-competitive inhibition considered allosteric?

    <p>It binds to areas other than the active site</p> Signup and view all the answers

    What is the role of the allosteric site in an enzyme?

    <p>It binds regulator molecules and influences the enzyme structure</p> Signup and view all the answers

    Which type of enzyme catalyzes the transfer of a group other than hydrogen from one substrate to another?

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

    What do Hydrolases catalyze in terms of bond breaking?

    <p>Hydrolysis of various bonds</p> Signup and view all the answers

    How do Lyases catalyze the removal of groups from substrates?

    <p>Without hydrolysis, forming products with double bonds</p> Signup and view all the answers

    Which class of enzymes catalyze the interconversion of isomers?

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

    What does an abnormally large amount of enzymes in the serum usually indicate?

    <p>Organ damage</p> Signup and view all the answers

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