Pre-Final Enzymes
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Questions and Answers

What is the function of most enzymes?

  • Prevent the reaction from occurring
  • Decrease the rate of a reaction
  • Stabilize the reaction
  • Increase the rate of a reaction (correct)

    • What is a substrate in an enzyme-catalyzed reaction?

  • The inhibitor of the reaction
  • The product of the reaction
  • The catalyst for the reaction
  • The reactant upon which the enzyme acts (correct)

    • What is absolute specificity in enzymes?

  • Not catalyzing any reaction
  • Catalyzing a particular reaction for only one substrate (correct)
  • Catalyzing one reaction for multiple substrates
  • Catalyzing multiple reactions for one substrate

    • What is stereochemical specificity in enzymes?

    <p>Distinguishing between stereoisomers</p> Signup and view all the answers

    What is an example of an enzyme with stereochemical specificity?

    <p>L-Amino-acid oxidase</p> Signup and view all the answers

    Study Notes

    Enzyme Functions and Specificity

    • The primary function of most enzymes is to increase the rate of chemical reactions in the body, allowing them to occur efficiently and accurately.
    • A substrate in an enzyme-catalyzed reaction is the molecule that an enzyme acts upon, binding to the active site of the enzyme to facilitate the chemical reaction.
    • Absolute specificity in enzymes refers to the ability of an enzyme to catalyze only one specific reaction or bind to only one specific substrate, ensuring high fidelity in biochemical reactions.
    • Stereochemical specificity in enzymes refers to the ability of an enzyme to distinguish between different stereoisomers (molecules with the same molecular formula and bond order, but differing in three-dimensional structure) of a substrate, allowing it to selectively catalyze reactions involving specific stereoisomers.
    • The enzyme lactate dehydrogenase exhibits stereochemical specificity, as it can differentiate between the D-lactate and L-lactate stereoisomers of lactic acid, only catalyzing the conversion of L-lactate to pyruvate.

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    Description

    Test your knowledge of pre-final enzymes in this quiz. Learn about the role of biological catalysts, the incredible rate acceleration of enzyme-catalyzed reactions, and the nomenclature used to name enzymes based on their functions. Ideal for students of biochemistry and molecular biology.

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