上游充通大￥ Shanghai Jiao Tong University 2.1 Elements of Cell and Viral Structures Cytoplasm Nucleoid Cell wall Cytoplasmic membrane Internal structure of microbial cells.Prokaryote cells lack a true nucleus and organelles原核细胞无真正的细胞核及细胞器Shanghai Jiao Tong University Chen Feng, Shanghai Jiao Tong University 2.1 Elements of Cell and Viral Structures Internal structure of microbial cells. Prokaryote cells lack a true nucleus and organelles原核细胞无真正的细胞核及细胞器