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  • Question
  • A noncompetitive inhibitor of an enzyme-catalyzed reaction


  • Options
  • A. increases KM and increases Vmax
  • B. increases KM and reduces Vmax
  • C. reduces KM and increases Vmax
  • D. reduces KM and reduces Vmax

  • Correct Answer
  • increases KM and reduces Vmax 


  • Enzymes and Kinetics problems


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    • 1. The Woolf-Augusteinsson-Hofstee plot of ν versus ν/[S] and the Eadie-Scatchard plot of ν/[S] versus ν do not involve reciprocals of ν therefore are considered to be more reliable when the error in v is

    • Options
    • A. non-significant
    • B. significant
    • C. nothing to do with the reliability
    • D. non significant in selected cases
    • Discuss
    • 2. Quasi steady state is also known as

    • Options
    • A. Michaelis Menten approach
    • B. Briggs-Haldane approach
    • C. Pseudo steady state
    • D. all of the above
    • Discuss
    • 3. The plot commonly used for determining the value of Vmax is

    • Options
    • A. Lineweaver Burk plot
    • B. Langmuir plot
    • C. Eadie Hofstee plot
    • D. all of these
    • Discuss
    • 4. An allosteric inhibitor of an enzyme usually

    • Options
    • A. participates in feedback regulation
    • B. denatures the enzyme
    • C. is a hydrophobic compound
    • D. causes the enzyme to work faster
    • Discuss
    • 5. In competitive inhibition a factor is obtained from the measurement of

    • Options
    • A. Vmax
    • B. KM
    • C. Y-intercept in Lineweaver-Burk Plot
    • D. None of these
    • Discuss
    • 6. The reciprocal equation for non competitive inhibition can be arranged to the equation for the

    • Options
    • A. Dixon plot
    • B. Woolf-Augusteinsson-Hofstee plot
    • C. Eadie-Scatchard plot
    • D. Hanes-Woolf plot
    • Discuss


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