Unit 4 test UNE medical biochemistry Questions With Complete Answers.

Unit 4 test UNE medical biochemistry Questions With Complete Answers. A deficiency in which of the following enzymes will NOT result in an increase in orotic acid? a. N-acetylglutamate synthetase b. Ornithine transcarbamoylase c. Argininosuccinate synthetase d. Argininosuccinate lyase N-acetylglutamate synthetase (NAG synthetase Feedback: deficiencies in NAG synthetase or carbamoyl phosphate synthetase I will NOT result in an increase in orotic acid. Which of the following enzymes is correctly paired with its activator? a. N-acetylglutamate synthtase; arginine b. Carbamoyl phosphate synthetase I; ATP c. Glutaminase; citrate d. Arginase; NADH N-acetylglutamate synthtase; arginine Feedback: arginine (an intermediate of the urea cycle), stimulates the synthesis of NAG by allosterically activating the enzyme N-acetylglutamate synthase Which of the following enzymes is regulated by N-acetylglutamate (NAGs)? a. Carbamoyl phosphate synthetase II b. Ornithine transcarbamoylase c. Carbamoyl phosphate synthetase I d. Arginosuccinate lyase Carbamoyl phosphate synthetase I (CPS I) Feedback