Biochemistry Lecture 9: Enzymes
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Questions and Answers

What are enzymes primarily responsible for?

  • Participating directly in the reaction
  • Increasing the energy barrier for substrates
  • Storing energy in the chemicals
  • Lowering the activation energy of reactions (correct)
  • What is the active region on an enzyme called?

  • Substrate-specific zone
  • Energy barrier site
  • Catalytic center (correct)
  • Reactant storage area
  • What is a holoenzyme composed of?

  • Cofactors only
  • Apoenzyme only
  • Apoenzyme and cofactors (correct)
  • Substrates only
  • What is the compound on which an enzyme acts called?

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

    What do enzymes form when a substrate binds to their active site?

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

    What is the term for the energy barrier that substrates need to overcome before a reaction will occur?

    <p>Activation energy</p> Signup and view all the answers

    Which type of cofactor are small organic molecules called?

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

    Which enzyme helps in the breakdown of lipids?

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

    Which type of specificity do enzymes exhibit when they act on a particular steric or optical isomer?

    <p>Stereo chemical specificity</p> Signup and view all the answers

    What is the term for the model where the enzyme changes its shape for substrate binding?

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

    What are metal ions referred to when they are tightly bound as cofactors?

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

    Which type of specificity do enzymes exhibit when they act on molecules with specific functional groups?

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

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