17) Which of the following is the regulatory step in cholesterol synthesis? (A) HMG-CoA synthase (B) HMG-CoA lyase (C) HMG-CoA reductase (D) squalene synthase (E) squalene epoxidase

3) When glucagon binds to its receptor on a liver cell, which of the following sequence of eventsoccurs to activate protein kinase A?(A) activation of adenylate cyclase, activation of G protein, production of cAMP(B) activation of G protein, activation of adenylate cyclase, production of cAMP(C) activation of G protein, production of cAMP, activation of adenylate cyclase(D) production of cAMP, activation of adenylate cyclase, activation of G protein(E) none of the above

17) Which of the following is the regulatory step in cholesterol synthesis?

(A) HMG-CoA synthase

(B) HMG-CoA lyase

(C) HMG-CoA reductase

(D) squalene synthase

(E) squalene epoxidase

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