বহুনির্বাচনি (MCQ)
১. The rate-limiting enzyme of the urea cycle is:
ক) Ornithine transcarbamoylase
খ) Argininosuccinate synthetase
গ) Carbamoyl phosphate synthetase I
ঘ) Arginase
ঙ) Argininosuccinate lyase
উত্তর দেখুন
সঠিক উত্তর: গ) Carbamoyl phosphate synthetase I
ব্যাখ্যা: CPS-I in liver mitochondria is the rate-limiting step; it needs N-acetylglutamate as an allosteric activator.
📖 রেফারেন্স: Lippincott Illustrated Reviews: Biochemistry · Nitrogen disposal: urea cycle