MICROANATOMY

DIGESTIVE SYSTEM

LIVER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the name of the process in which excess amino acids undergo a conversion in the liver to form urea with the removal of the amino group?
A
absorption
B
assimilation
C
digestion
D
deamination
Explanation: 

Detailed explanation-1: -This reaction occurs primarily in liver mitochondria. Most of the NH4+ ion formed by oxidative deamination of glutamate is converted to urea and excreted in the urine in a series of reactions known as the urea cycle.

Detailed explanation-2: -It is the removal of an amine group from a molecule in the presence of an enzyme called deaminase. It takes place in the liver. Hence the process of breaking down excess amino acids in the liver is known as Deamination.

Detailed explanation-3: -In the liver, the amino acid is converted to ammonia soluble in water to form alkaline fluid, which is toxic through deamination. This toxic substance is converted to urea for safe excretion. The protease enzyme breaks down the digested protein into amino acids in the small intestine and stomach.

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