LIFE SCIENCE

Detailed explanation-1: -There are about 300 amino acids that occur in nature.”

Detailed explanation-2: -More than 300 amino acids are listed in the Practical Handbook of Biochemistry and Molecular Biology, but only the twenty amino acids in the table below are used to synthesize proteins. Most of these amino acids differ only in the nature of the R substituent.

Detailed explanation-3: -Both animal and plant proteins are made up of about 20 common amino acids.

Detailed explanation-4: -Roughly 500 amino acids have been identified in nature, but just 20 amino acids make up the proteins found in the human body.

Detailed explanation-5: -More than 300 amino acids are found in nature but only 20 amino acids are standard and present in protein because they are coded by gene. Other non-standard amino acids are modified aminoacids and called non-protein amino acids.