What is the final step in the degradation of amino acids?
1) Conversion and elimination of ammonia as urea via carbamoyl phosphate synthase and the urea cycle
2) Conversion and elimination of ammonia as urea via carbamoyl phosphate synthase and the citric acid cycle
3) Conversion and elimination of ammonia as urea via carbamoyl phosphate synthase and the glycolysis pathway
4) Conversion and elimination of ammonia as urea via carbamoyl phosphate synthase and the electron transport chain