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.
<span>A higher developed organism will have a higher degree of specialization.</span>
The answer would have to be carcinogens. Carcinogens are substances that are capable of causing mutation to cells. These mutation usually referred as cancer. Common carcinogens that we know include tobacco smoke, asbestos, arsenic, radon and pesticides. Carcinogens can be inhaled, ingested or absorbed.
