What is the role of the Krebs-Henseleit cycle in the formation of urea?
It converts ammonium ions to urea
It converts urea to ammonium ions
It converts nitrate ions to urea
It converts urea to nitrate ions
The Krebs-Henseleit cycle, also known as the ornithine cycle, is a biochemical pathway in the liver that converts toxic ammonium ions, which are produced during amino acid metabolism, into urea, which is excreted in the urine. The cycle involves several enzymes and intermediates, including ornithine, citrulline, and arginine. Ultimately, the cycle produces urea, which is less toxic than ammonium ions and can be safely eliminated from the body.