When proteins undergo deamination, the waste substance found in the urine is mostly ________.

Question

Quizplus · Accepted Answer

During deamination, amino groups (-NH2) are removed from amino acids and combined with carbon dioxide to form urea in the liver. Urea is excreted in the urine as the primary waste product of protein metabolism. Ammonia (choice B) is a toxic substance that is converted to urea in the liver before excretion. Acetyl CoA (choice C) and ketone bodies (choice D) are not waste products of protein metabolism, but rather products of lipid metabolism.

When Proteins Undergo Deamination, the Waste Substance Found in the Urine