LIFE SCIENCE

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: -Each amino acid is delivered to the ribosome by a transfer RNA? molecule depending on the code in the messenger RNA. These amino acids are added in sequence to form a chain of amino acids. After the last amino acid is added to the chain, it folds up to form the final protein.

Detailed explanation-3: -Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis-the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.