Concept:Deamination is the removal of an amino group from an amino acid.
This process mainly happens in the liver.
Explanation:When proteins are digested, excess amino acids cannot be stored in the body.
The liver removes the amino group,
−NH2, from these amino acids.
This produces ammonia, which is toxic.
The liver quickly converts ammonia into urea.
Urea is then carried by the blood to the kidneys for excretion in urine.
Therefore, the liver is the primary organ where deamination occurs.
Answer:D. Liver.