Question

Which of the following amino acids is essential in human diet?

• A. Alanine
• B. Glycine
• C. Valine
• D. Glutamic acid

Hint:

Remember: Essential amino acids include Valine, Leucine, Isoleucine, Lysine, Methionine, Threonine, Tryptophan, Histidine, and Phenylalanine.

Answer 1

The Correct Option is C

The question asks which of the given amino acids is essential in the human diet. Let's explore the concept of essential amino acids to understand the answer.

• Essential Amino Acids: These are amino acids that cannot be synthesized by the human body in adequate amounts and must be obtained from dietary sources. Examples include Valine, Leucine, Isoleucine, Lysine, Methionine, Phenylalanine, Threonine, and Tryptophan.
• Non-Essential Amino Acids: These can be synthesized by the human body and do not necessarily need to be obtained from the diet. Examples include Alanine, Glycine, and Glutamic acid.

Given this information, let's analyze the options:

1. Alanine: This is a non-essential amino acid, which means the body can produce it even if it is not consumed directly in the diet.
2. Glycine: Similar to alanine, glycine is also a non-essential amino acid and can be synthesized by the human body.
3. Valine: This is an essential amino acid. Humans must obtain valine through their diet as the body cannot produce it.
4. Glutamic acid: Another non-essential amino acid, glutamic acid, can be synthesized by the body.

Based on the above analysis, valine is the only essential amino acid among the listed options. Therefore, the correct answer is:

Valine