30. Phosphofructokinase-1 (A) is activated by ADP and citrate (B) is inhibited by ATP and citrate (C) is activated by citrate and fructose-2,6-bisphosphate (D) is activated by ATP and fructose-2,6-bisphosphate (E) is inhibited by ATP and fructose-2,6-bisphosphate

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.

30. Phosphofructokinase-1
(A) is activated by ADP and citrate
(B) is inhibited by ATP and citrate
(C) is activated by citrate and fructose-2,6-bisphosphate
(D) is activated by ATP and fructose-2,6-bisphosphate
(E) is inhibited by ATP and fructose-2,6-bisphosphate

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