Question

Essential-non-essential amino acid is

• A. Lysine - Leucine
• B. Valine - Tyrosine
• C. Methionine - Threonine
• D. Alanine - Cystine

Answer 1

The correct option is B Valine - Tyrosine

Amino acids are the elementary unit of proteins. Proteins are required for the human body to remain healthy and alive. Amino acids are two types. Essential amino acids which can be taken by a human from their food. Non-essential amino acids can be made by the human body. There are 20 different amino acids -in which 9 amino acids are essential and 11 amino acids are non-essential. Lysine - Leucine and methionine - Threonine are pairs of essential amino acids, Alanine - Cystine is non-essential amino acids and Valine -Tyrosine is a pair of essential and non-essential amino acids. Thus, the correct option is B.