原核生物是指由原核细胞构成的生物,如细菌、蓝藻、放线菌等。原核生物一般为单细胞结构。一、原核生物的细胞结构原核细胞的基本结构:细胞壁的主要成分是糖类和蛋白质结合成的化合物,不含纤维素;细胞膜的成分、结构与真核细胞相似;细胞质中有核糖体,无其他细胞器;拟核中无染色 Prokaryotes are organisms made up of prokaryotic cells, such as bacteria, cyanobacteria, actinomycetes, and the like. Prokaryotes are generally single-celled structures. I. Cell Structure of Prokaryotes The basic structure of prokaryotic cells: The main component of the cell wall is a compound of carbohydrates and proteins, which does not contain cellulose; the composition and structure of cell membranes are similar to those of eukaryotic cells; there are ribosomes in the cytoplasm, Other organelles; no staining in nucleation