Which of the following statements regarding the urea cycle is true? (A) Fumarate acts as a connecting link between urea cycle and the CAC. (B) The urea cycle occurs solely in the mitochondria. (C) Citrulline and arginine reacts to form argininosuccinate. (D) Ornithine formed in the last reaction of the urea cycle is excreted from the body along with urea. (E) The purpose of the urea cycle is to produce energy (4 ATP per ammonia that enters) for the liver.

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