Nitrogen atoms of urea produced in the urea cycle are derived from ___________
(a) Ammonia and aspartic acid
(b) Nitrate
(c) Nitrite
(d) Ammonia
This question was addressed to me by my college director while I was bunking the class.
My doubt is from Nitrogen Excretion and the Urea Cycle topic in section Amino Acid Oxidation and the Production of Urea of Biochemistry