Question

Which of these is not a component of proteins?
(1) Tryptophan
(2) Tyrosine
(3) Ornithine
(4) Glycine​

Answer 1

Answer:ornithine

Explanation:

Answer 2

Answer:

Ornithine is not a compound of protein.

Explanation:

Ornithine:

• Ornithine is a non-protein amino acid that is produced mostly from L-glumate in plants and from the urea cycle in animals as a result of a reaction mediated by arginine-based enzymes.
• An organic amino acid called ornithine is present in foods like meat, fish, dairy products, and eggs.
• One of the important components of the urea cycle, ornithine accounts for 80% of the body's nitrogen excretion.

Tryptophan:

• The formation and maintenance of the body's proteins, muscles, enzymes, and neurotransmitters depend on the amino acid tryptophan, which is also necessary for infants' optimal growth.
• Several foods high in protein, such as eggs, cheese, meat, fish, wheat, rice, potatoes, and bananas, also contain tryptophan.

Tyrosine:

• Tyrosine is produced by the body from the amino acid phenylalanine.
• Tyrosine can be found in dairy products, meats, fish, eggs, nuts, beans, oats, and wheat, as well as other foods.
• The class of amino acids known as aromatic includes tyrosine. Tyrosine residues are naturally abundant in most proteins, where they make up around 3.2 percent.

Glycine​:

• An amino acid, or building block of protein, is glycine.
• About 2 grammes of glycine are consumed daily in a normal diet.
• The main sources include foods high in protein such meat, fish, dairy products, and legumes.

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