Question

Deamination is a process in which
A.Poisonous urea is removed from the blood and it occurs in the kidney
B.Amino acid is absorbed from the digested food and it occurs in intestinal villi
C.Amino acid combines with ammonia to form protein
D.Amino acids are broken down to release carbon dioxide and the amino group

Answer 1

The deamination is the process of removing an amino group from a molecule.
Enzymes that catalyze this reaction are called deaminases.
In the human body, the deamination takes place primarily in the liver; in spite of this, it can also occur in the kidney.

Complete answer: The deamination is the process by which the amino acids are broken down if there is an excess of protein intake.
The amino group is removed from the amino acid and converted to ammonia.
Ammonia is toxic to the human system and the enzymes convert it to urea or to uric acid molecules in the liver.
Therefore, the correct answer is option D.

Additional information: In human beings, the deamination occurs when there is an excess in the protein consumed, which results in the removal of an amine group, which is then converted into the ammonia and expelled through the process called urination.
This deamination process allows the body to convert the excess amino acids into usable by-products.
During this process of deamination, the amine group is reduced to ammonia by the addition of a hydrogen atom.
Using the enzymes, ammonia is formed because it is relatively toxic to the human body, it is then converted to urea from the amino acids.

Note:
The deamination removes the amino group from the amino acid and converts it to ammonia.
Since the bases cytosine, the adenine, and the guanine have amino groups on them that can be deaminated.
The deaminations can result in mutation in DNA.