NEET BIOLOGY

Detailed explanation-1: -A protein molecule is made from a long chain of these amino acids, each linked to its neighbor through a covalent peptide bond (Figure 3-1). Proteins are therefore also known as polypeptides. Each type of protein has a unique sequence of amino acids, exactly the same from one molecule to the next.

Detailed explanation-2: -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-3: -Amino acids are linked together by peptide bonds to form protein. Peptide bonds are formed by the biochemical reaction that extracts a water molecule when the two amino acids are joined together.

Detailed explanation-4: -When two amino acids join together, they form a dipeptide. These two amino acids are linked by a peptide bond. A string of many peptides is called a polypeptide.

Detailed explanation-5: -For example, proteins are composed of monomers called amino acids. They are linked together to form a polypeptide chain, which folds into a three dimensional (3D) structure to constitute a functional protein (Figure 1).