Which of the following is a mitochondrial enzyme of Urea Cycle: (A) Arginase, (B) Carbamoyl Phosphate synthetase I, (C) Arginosuccinate lyase, (D) Arginosuccinate synthetase.
Answer is B. CPS - I is a mitochondrial enzyme and catalyses rate limiting step of Urea Cycle.
All the Cytoplasmic enzymes of urea cycle start with letter "A".