24. Azide is poisonous, because it tightly binds ______ of the respiratory chain. (A) CoQ (B) cyt a (C) cyt b (D) cyt c (E) cyt a₃

4. Which of the following descriptions about the Michaelis-Menten rate equation is incorrect ? (A) KM measures the substrate concentration at which the reaction rate is Vmax/2 (B) kcat is the turnover number that measures the rate of the catalytic process (C) The ratio kcat/KM is a convenient measure of enzyme efficiency (D) kcat = Vmax/[Enz] (E) A competitive inhibitor decreases the apparent KM.

24. Azide is poisonous, because it tightly binds ______ of the respiratory chain.
(A) CoQ
(B) cyt a
(C) cyt b
(D) cyt c
(E) cyt a₃

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