When proteins are broken down into their subunits, what happens to the amino group removed from the amino acids that are not used to rebuild proteins or other molecules?
A) They are formed into acetyl-CoA.
B) They are converted into pyruvate.
C) They are excreted in the urine.
D) They are stored as glycogen in liver.
E) They are stored in vacuoles in muscle.

Question

Quizplus · Accepted Answer

The amino group removed from amino acids during their breakdown is converted into ammonia, which is then converted into urea in the liver. Urea is then excreted in the urine, making option C correct.

When Proteins Are Broken Down into Their Subunits, What Happens