Which of the following non-essential Amino? (CSS 2012 General Science & Ability Paper)

Amino acids are molecules that combine to form proteins. Amino acids and proteins are the building blocks of life. When proteins are digested or broken down, amino acids are the result. The human body then uses amino acids to make proteins to help the body:

• Break down food
• Grow
• Repair body tissue
• Perform many other body functions

Amino acids can also be used as a source of energy by the body.

• Glycine, serine, proline, glutamic acid, alanine, aspartic acid, cysteine, tyrosine, asparagine and glutamine all are non-essential amino acids.
• Isoleucine, leucine, threonine, lysine, methionine, phenylalanine, tryptophan, and valine are essential amino acids.