上游充通大￥ Shanghai Jiao Tong University 1.2.2 Cells as chemical machines and as coding devices Cells are self-replicating entities可自我复制的主体， they can be viewed in two ways: 圈As chemical machines作为化学机器的细胞 carrying out chemical transformations of non-living materials to living materials to provide energy and precursors for cell reproduction As coding devices作为编码装置的细胞 serving as storehouses and processors of genetic information(DNA)to give the cell instructions to make new copies of itself Chen Feng,Shanghai Jiao Tong UniversityShanghai Jiao Tong University Chen Feng, Shanghai Jiao Tong University 1.2.2 Cells as chemical machines and as coding devices Cells are self-replicating entities可自我复制的主体, they can be viewed in two ways: As chemical machines作为化学机器的细胞 • carrying out chemical transformations of non-living materials to living materials to provide energy and precursors for cell reproduction As coding devices作为编码装置的细胞 • serving as storehouses and processors of genetic information (DNA) to give the cell instructions to make new copies of itself