Question

Among the following, the essential amino acid is:
A. Aspartic acid
B. Valine
C. Alanine
D. Serine

Answer 1

You can classify the amino acids into essential amino acids and non-essential amino acids. This classification is based on the factor that the human body can synthesize few amino acids and the remaining amino acids must be supplied from the food.

Complete answer:
Human body cannot synthesize the essential amino acids. You need to have proper food that will supply the essential amino acids. There are nine essential amino acids. These include histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
Non-essential amino acids can be synthesized within the human body. So even if you do not get these non-essential amino acids from food, there will not be any deficiency as the human body will synthesize these non-essential amino acids. Some of the examples of the non-essential amino acids include Aspartic acid, Alanine and Serine.

**Thus, the correct answer is the option B. Valine.

Additional information:**
Amino acids are part of polypeptides and proteins. A peptide bond is formed when an amino group of one alpha amino acid reacts with a carboxylic group of another amino acid. The peptide linkage is an amide bond.

Note:
In amino acids, the amino functional group and carboxylic functional group is linked to the same carbon atom. Hence, the amino acids are called alpha amino acids.