48. In the urea cycle, which one of the following enzymes is in the matrix of liver mitochondria to catalyze reactions?
(A) Carbamoyl phosphate synthase I
(B) Argininosuccinate synthase
(C) Argininosuccinate lyase
(D) Arginase
(E) All of them.

1. 題目解析這道題目考查的是尿素循環...