谁能帮写一篇作文介绍enzytme要是英语的.不要太短!

没有enzytme只有enzym e酶（英语：Enzyme,又称酵素）,Enzymesare proteins that catalyze (i。e。,increase the rates of) chemical reactions。enzymatic reactions,the molecules at the beginning of the process,called substrates,are converted into different molecules,called products。Almost all chemical reactions in a biological cell need enzymes in order to occur at rates sufficient for life。Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities,the set of enzymes made in a cell determines which metabolic pathways occur in that cell。 再问： 额。。。。抱歉，写错了，原来是。。。。那个字怎么拼？。。。。能在补充点吗？有点短。。。。。不过还是谢谢