Enzymes are crucial to metabolism because they allow organisms to drive desirable reactions that require energy that will not occur by themselves, by coupling them to spontaneous reactions that release energy.
Os encimas son fundamentais no metabolismo porque permiten aos organismos impulsar as reaccións desexables que requiren enerxía e que non ocorren espontaneamente, ao acoplalas a reaccións espontáneas que liberan enerxía.