The number of amino acids found in proteins that a human body can synthesize is

10

The answer is (2) 10.

There are 20 amino acids that are found in proteins. Of these 20 amino acids, 10 can be synthesized by the human body. The other 10 amino acids must be obtained from the diet.

The 10 amino acids that can be synthesized by the human body are:

• Alanine
• Arginine
• Aspartic acid
• Asparagine
• Cysteine
• Glutamic acid
• Glutamine
• Glycine
• Proline
• Serine

The 10 amino acids that must be obtained from the diet are:

• Histidine
• Isoleucine
• Leucine
• Lysine
• Methionine
• Phenylalanine
• Threonine
• Tryptophan
• Tyrosine
• Valine