試題詳解

48. Which of the following descriptions about human metabolism is    correct   ?

(1) The Cori cycle is the synthesis of alanine from pyruvate in skeletal muscle and the synthesis of pyruvate from alanine in liver.

(2) Glucokinase in the liver acts in the conversion of liver glycogen to glucose 1-phosphate.

(3) The largest energy store in a well-nourished human is liver glycogen.

(4) Among its numerous metabolic effects, the protein leptin makes muscle and liver cells more sensitive to insulin.

(5) The hormone insulin decreases appetite.
(A) 1 and 4.
(B) 2 and 5.
(C) 1 and 3.
(D) 4 and 5.
(E) 4 only.