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

Step 1: Understanding essential amino acids.
Essential amino acids are those amino acids which cannot be synthesized by the human body in sufficient amounts. Therefore, they must be obtained directly from the diet through food sources such as proteins.
Step 2: Classification of the given options.
(A) Alanine: Alanine is a non-essential amino acid because it can be synthesized in the human body.
(B) Glycine: Glycine is also a non-essential amino acid as it is produced by the body.
(C) Valine: Valine is an essential amino acid. It cannot be synthesized by humans and must be obtained from dietary proteins.
(D) Glutamic acid: Glutamic acid is a non-essential amino acid synthesized in the body.
Step 3: Conclusion.
Among the given options, only Valine is an essential amino acid required in the human diet.