This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Enzymes for urea synthesis are present in: 
Select and explain. 
A. Cytoplasm, B. Mitochondrial matrix, C. Both of the above, D. none of the above
C: Both of the above
Answer: C: Both of the above 
Explanation: Hepatic urea synthesis takes place in pa in the mitochondrial matrix and in pa in the cytosol. Ref: Harper 28th edition, chapter 28.