What are essential and non-essential amino acids ? Give two examples of each. (3 marks)
Essential amino acids : Amino acids which the body cannot synthesize are called essential amino acids.
Example : Valine, leucine etc. Therefore they must be supplied in diet.
Non-essential amino acids : Amino acids which the body can synthesize are called non-essential amino acids. Therefore, they may not be present in diet.
Example : Glycine, alanine etc.