Final answer:
Nonessential amino acids are those that can be synthesized by our bodies even if we don't get them from food. Examples of nonessential amino acids include alanine, arginine, asparagine, and tyrosine. They are important for cell metabolism.
Step-by-step explanation:
Nonessential amino acids are those that our bodies can produce even if we do not get them from the food we eat. Unlike essential amino acids, which must be obtained from the diet, nonessential amino acids like alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine can be synthesized in the human body. These nonessential amino acids play important roles in cell metabolism and are not required in the diet.