LIFE SCIENCE

Detailed explanation-1: -Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

Detailed explanation-2: -Proteins are natural polymer of −amino acids. A definite sequence of amino acids form a specific protein. Two or more than two amino acids bind to give peptide bond. Proteins are polypeptide, which loses its biological activity by physical or chemical changes.

Detailed explanation-3: -L-amino acids are the molecules used to produce proteins in the human body and are divided into nonessential amino acids and essential amino acids (which we must get from consuming our food). In fact, L-amino acids occur in all proteins made by animals (including humans), plants, bacteria, and fungi.

Detailed explanation-4: -L amino acids are found because we(eukaryotes) have enzymes which can only recognize L confomation and that is also true for D carbohydrates which can be recognized by specific enzyme during metabolism..