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Choose the correct non-protein amino aci...

Choose the correct non-protein amino acid

A

Hydroxyproline

B

Cystine

C

Gamma-aminobutyric acid

D

Hydroxylysine.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question of identifying the correct non-protein amino acid from the given options, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Definition of Non-Protein Amino Acids**: - Non-protein amino acids are amino acids that do not participate in the formation of proteins. They can have various functions in the body, such as acting as neurotransmitters or being involved in metabolic pathways. 2. **Examine the Given Options**: - The options provided are: - Hydroxyproline - Cysteine - Gamma-aminobutyric acid (GABA) - Hydroxylysine 3. **Analyze Each Option**: - **Hydroxyproline**: - This is a non-essential amino acid that is primarily found in collagen. It is involved in protein synthesis, making it a protein-forming amino acid. - **Cysteine**: - Cysteine is a sulfur-containing amino acid that is important for protein structure and function. It is also a protein-forming amino acid. - **Gamma-aminobutyric acid (GABA)**: - GABA is an inhibitory neurotransmitter in the brain and is classified as a non-protein amino acid. It does not contribute to protein synthesis. - **Hydroxylysine**: - Similar to hydroxyproline, hydroxylysine is involved in collagen formation and is a protein-forming amino acid. 4. **Identify the Correct Answer**: - From the analysis, GABA (gamma-aminobutyric acid) is the only option that is a non-protein amino acid. Therefore, the correct answer is **Gamma-aminobutyric acid (GABA)**. ### Final Answer: The correct non-protein amino acid is **Gamma-aminobutyric acid (GABA)**.
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