HUMAN NUTRITION

Detailed explanation-1: -Of these 20 amino acids, nine amino acids are essential: Phenylalanine.

Detailed explanation-2: -Types of All Amino Acids. All The 20 amino acids are classified into two different amino acid groups. Essential amino acids and Non-essential amino acids together make up the 20 amino acids. Out of the 20 amino acids, 9 are the essential amino acids, and the others are Non-essential amino acids.

Detailed explanation-3: -Six amino acids are non-essential (dispensable) in humans, meaning they can be synthesized in sufficient quantities in the body. These six are alanine, aspartic acid, asparagine, glutamic acid, serine, and selenocysteine (considered the 21st amino acid).

Detailed explanation-4: -There are a total of twenty-one amino acids, all of which are responsible for different roles throughout the body. Each amino acid is a large block of proteins, all different shapes, and sizes. In fact, some amino acid strands form together to create larger shaped proteins.