Enzyme Classification and General Properties
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Questions and Answers

What is the term for enzymes that are formed of proteins only?

  • Complex enzymes
  • Conjugated enzymes
  • Simple enzymes (correct)
  • Holoenzymes
  • Which group of enzymes catalyze the reactions of oxidation and reduction?

  • Synthases
  • Isomerases
  • Transferases
  • Oxidoreductases (correct)
  • What is the role of NAD+ as a coenzyme?

  • It acts as an electron withdrawer
  • It catalyzes the reactions of oxidation and reduction
  • It catalyzes the transfer of groups
  • It acts as a hydrogen carrier (correct)
  • What is the term for enzymes that are formed of several subunits, each with a different catalytic activity?

    <p>Complex enzymes</p> Signup and view all the answers

    Which group of enzymes catalyze the transfer of groups other than hydrogen from one substrate to another?

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

    Which of the following best describes enzymes?

    <p>Biological catalysts that are mostly protein in nature and not consumed within the reaction</p> Signup and view all the answers

    What is the difference between catalyzed and uncatalyzed reactions?

    <p>Enzymes increase the rate of reaction without being consumed, while uncatalyzed reactions occur at a slower rate</p> Signup and view all the answers

    Which statement about the general properties of enzymes is true?

    <p>They act within a moderate pH and temperature range</p> Signup and view all the answers

    What is optical specificity (stereospecificity) in relation to enzymes?

    <p>Enzymes act only on one of two isomers</p> Signup and view all the answers

    What is group specificity in relation to enzymes?

    <p>Enzymes act on a specific group or linkage</p> Signup and view all the answers

    Enzymes located outside the cell are called housekeeping enzymes

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

    Holoenzyme is the functional unit of simple enzymes

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

    Metal cofactors are considered as organic cofactors

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

    NAD+ acts as a hydrogen carrier

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

    Mg+2 acts as an electron withdrawer facilitating the action of DNA polymerase

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

    Fatty acid synthase enzyme is an example of a simple enzyme

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

    Oxidoreductases catalyze the reactions of oxidation and addition of oxygen

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

    Transferases catalyze the transfer of groups other than hydrogen from one substrate to another

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

    Synthases are not considered transferases

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

    Isomerases catalyze the introduction of a functional group into a molecule

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

    Enzymes are consumed within the reaction they catalyze.

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

    Not all enzymes are protein in nature.

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

    Enzymes act within a wide pH and temperature range.

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

    Optical specificity refers to enzymes acting on both isomers of a compound.

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

    Group specificity involves enzymes acting on a specific group or linkage.

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

    Intracellular enzymes are secreted from the cell where they function.

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

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