“先有鸡,还是先有蛋”?这是历来人们喜欢争论的有趣话题。因为鸡生蛋,蛋生鸡,循环反复,似乎没有源头。进入分子生物学时代,人们才知道生命就是核酸和蛋白质两种大分子物质的相互运动。核酸包括“脱氧核糖核酸”(简称DNA)和“核糖核酸”(简称RNA)。核酸携带遗传信息,是制造蛋白 “Have chicken first, or have egg first?” This is an interesting topic that people have always liked to argue about. Because chicken, egg raw chicken, repeated cycles, it seems that there is no source. Into the era of molecular biology, people only know that life is nucleic acid and protein two kinds of macromolecules mutual movement. Nucleic acids include “deoxyribonucleic acid” (DNA for short) and “ribonucleic acid” (RNA for short). Nucleic acids carry genetic information and are made of proteins