Enzyme Active Site and Substrate Interaction Quiz
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Questions and Answers

What is the role of enzymes in catalyzing biochemical reactions?

  • Increase the activation energy
  • Remain unchanged during the reaction (correct)
  • Prevent the formation of products
  • Change their conformation permanently

    • What determines the specificity of an enzyme in binding with its substrate?

  • Number of substrates available
  • Activation energy
  • Physical size of the enzyme
  • Conformation of the active site (correct)

    • How do enzymes affect the speed of biochemical reactions they catalyze?

  • Change the enzymes' properties
  • Increase activation energy
  • Decrease activation energy (correct)
  • Stop the reactions from occurring

    • What is the main characteristic of an enzyme's active site that allows it to bind with specific substrates?

    <p>Complementary shape to the substrate</p> Signup and view all the answers

    What is the main function of enzymes in the digestive process?

    <p>Breaking down large nutrient molecules into smaller molecules</p> Signup and view all the answers

    According to enzyme nomenclature, what does the suffix -lytic indicate?

    <p>The enzyme breaks down the corresponding substrate</p> Signup and view all the answers

    What is the significance of the 'lock and key' model in enzyme activity?

    <p>Only specific substrates can bind to an enzyme due to their unique shapes</p> Signup and view all the answers

    In the context of enzymes, what is activation energy related to?

    <p>Initiating a specific chemical reaction</p> Signup and view all the answers

    What is the main difference between competitive and noncompetitive inhibitors?

    <p>Competitive inhibitors bind at the active site, while noncompetitive inhibitors bind at another site on the enzyme</p> Signup and view all the answers

    How do irreversible inhibitors affect enzyme activity?

    <p>They prevent formation of the enzyme-substrate complex</p> Signup and view all the answers

    Why do competitive inhibitors decrease the reaction rate of enzymes?

    <p>By competing with the substrate for the active site</p> Signup and view all the answers

    What is the role of activators in enzyme activity?

    <p>To bind at an allosteric site and enhance catalysis</p> Signup and view all the answers

    How do noncompetitive inhibitors differ from competitive inhibitors in terms of binding location?

    <p>Noncompetitive inhibitors bind at a different region on the enzyme, while competitive inhibitors bind at the active site</p> Signup and view all the answers

    What effect does irreversible inhibition have on the availability of active enzymes?

    <p>It decreases availability by blocking active sites permanently</p> Signup and view all the answers

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