Chemical Kinetics and Enzyme Kinetics Study
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Questions and Answers

Which form of the allosteric enzyme do substrates bind more readily to?

  • Both T and R forms equally
  • T form
  • R form (correct)
  • Neither T nor R form

    • At low substrate concentrations, why is it difficult for substrate to bind to the T form of allosteric enzymes?

  • T form has a higher affinity for substrates
  • T form is less prevalent than R form (correct)
  • T form is more stable than R form
  • T form undergoes conformational changes

    • What effect does a positive effector have on the threshold concentration level of substrate needed for activity in allosteric enzymes?

  • Lowers the threshold concentration level (correct)
  • Raises the threshold concentration level
  • Has no effect on the threshold concentration level
  • Changes the enzyme's kinetics

    • In allosteric enzymes, what effect do negative effectors have on the binding of substrates?

    <p>Decreases the binding of substrates</p> Signup and view all the answers

    How do heterotropic effects influence the allosteric enzyme's reaction rate?

    <p>Increase the reaction rate</p> Signup and view all the answers

    What does the sequential model propose about the structure changes in subunits of allosteric enzymes?

    <p>Only one subunit changes at a time as substrates bind sequentially</p> Signup and view all the answers

    What effect does negative cooperativity have on the binding of additional substrate molecules in allosteric enzymes?

    <p>Inhibits binding of additional substrates</p> Signup and view all the answers

    How do positive effectors affect the equilibrium between T and R forms of allosteric enzymes?

    <p>Shift towards R form</p> Signup and view all the answers

    How does cooperativity affect enzyme activity in allosteric enzymes?

    <p>Increases enzyme activity due to substrate competition</p> Signup and view all the answers

    What is the main difference between homotropic effects and heterotropic effects in allosteric enzymes?

    <p>Homotropic effects are solely due to substrate binding while heterotropic effects involve regulatory molecule binding.</p> Signup and view all the answers

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