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An Enzyme Was Assayed in the Absence (−) or Presence

Question 66

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An enzyme was assayed in the absence (−) or presence (+) of an allosteric effector, and the following Lineweaver-Burk plot was obtained: An enzyme was assayed in the absence (−) or presence (+) of an allosteric effector, and the following Lineweaver-Burk plot was obtained: Which statement about the allosteric effector is correct? A) The effector is an activator that increases both V<sub>max</sub> and K<sub>m</sub>. B) The effector is an activator that increases V<sub>max</sub> but decreases K<sub>m</sub>. C) The effector is an inhibitor that decreases both K<sub>m</sub> and V<sub>max</sub>. D) The effector is an inhibitor that increases K<sub>m</sub> but decreases V<sub>max</sub>. Which statement about the allosteric effector is correct?


A) The effector is an activator that increases both Vmax and Km.
B) The effector is an activator that increases Vmax but decreases Km.
C) The effector is an inhibitor that decreases both Km and Vmax.
D) The effector is an inhibitor that increases Km but decreases Vmax.

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