To breathe, they use the <span>the carbon dioxide. Carbon dioxide is the main element which help the organisms to breathe.</span>
<span>ENZYMES ARE PROTEINS. All proteins are made up of amino acid.. Enzymes are used as catalysts in metabolic reactions in living organisms. They help to speed up the rate of chemical reaction but they are not used up in the reaction. Enzymes requires optimum conditions to function optimally. </span>
They are both in the same cell
