Quiz 3
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Questions and Answers

Gibbs free energy is more likely negative when_________.

  • entropy increases and enthalpy is low (correct)
  • entropy decreases and enthalpy is high
  • entropy and enthalpy are high
  • entropy and enthalpy are low

    • The 2nd law of thermodynamics stipulates that_______.

  • entropy decreases
  • enthalpy (bond energy) increases
  • entropy increases (correct)

    • An enzymatic reaction will most likely proceed if_________.

  • the activation energy is lower than the energy expended to promote a reaction. (correct)
  • the activation energy is higher than the energy expended to promote a reaction.
  • activation energy is not provided due to enzyme misfolding.
  • two reactants bind to the enzyme that normally do not bind because of a mutation in the binding region.

    • Energy carriers are activated________.

    <p>during the breakdown of molecules</p> Signup and view all the answers

    Gibbs free energy is negative when_______.

    <p>bonds are broken</p> Signup and view all the answers

    •𝚫G indicates_______.

    <p>the change in a reaction from substrate to product</p> Signup and view all the answers

    In Catabolism, molecules are____whereas in Anabolism molecules are_______.

    <p>broken down; synthesized</p> Signup and view all the answers

    Which of the molecules below are activated carriers?

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

    Equilibrium refers to a state where_______.

    <p>reactants and products do no longer change</p> Signup and view all the answers

    Enzymes________.

    <p>lower the activation energy without participating in the reaction between two reactants leading to a product.</p> Signup and view all the answers

    Study Notes

    Thermodynamics and Reactions

    • Gibbs free energy is more likely negative when the reaction is spontaneous.
    • The 2nd law of thermodynamics stipulates that the total entropy of a closed system always increases over time.

    Enzymatic Reactions

    • An enzymatic reaction will most likely proceed if the substrate binds to the active site of the enzyme.
    • Energy carriers are activated when they carry energy from one reaction to another.

    Gibbs Free Energy

    • Gibbs free energy is negative when the reaction is spontaneous and favorable.
    • ΔG indicates the change in Gibbs free energy.

    Metabolism

    • In Catabolism, molecules are broken down to release energy, whereas in Anabolism molecules are built up to store energy.

    Activated Carriers

    • ATP, NADH, and FADH2 are activated carriers.

    Equilibrium

    • Equilibrium refers to a state where the rates of forward and reverse reactions are equal.

    Enzymes

    • Enzymes act as biological catalysts to speed up chemical reactions in living organisms.

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