This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urea Cycle and Disorders, Subject name: Biochemistry
Carbamoyl phosphate is used in- 
Select and explain. 
A. Urea, B. Uric acid, C. Pyruvic acid, D. Stearic acid
A: Urea
Answer: A: Urea 
Explanation: Ans. is 'a' i.e., Urea o Carbamoyl phosphate is used in the synthesis of urea (urea cycle).Aspartate - NH. (or NH4+) + CO, + H,0 + 3 ATP - Fumarate + Urea + 2 ADP + 2Pi + AMP + PPio Kidney and intestine contribute to most of body arginine because they posses all the urea cycle enzymes except arginase.o Brain can synthesize urea from citrulline (AMU 93,AMC 90) but lacks enzyme for formation of citrulline from orthithine, i.e., ornithine transcarbamylase.o Thus neither brain nor kidney can form urea in significant amount.