In this article we will discuss about the cell structure of bacteria with the help of diagrams. A bacterial cell (Fig. 2.5) shows a typical prokaryotic structure. The cytoplasm is enclosed by three layers, the outermost slime or capsule, the middle cell wall and inner cell membrane. The major cytoplasmic contents are nucleoid, plasmid, ribosome, mesosome etc., and the cell [...]
In this article we will discuss about the harmful and useful activities of bacteria. Harmful Activities: Some bacteria are harmful to human affairs in different ways: a. Pathogenic Bacteria: These bacteria cause great losses to plant and animal population by causing several diseases. Some important bacterial diseases of plants and animals, including human beings is given below (Table 2.6-2.8 and [...]
The following points highlight the five methods by which reproduction in bacteria takes place. The methods are: 1. Binary Fission 2. Conidia 3. Budding 4. Cysts 5. Endospore. Method # 1. Binary Fission: In binary fission, single cell divides into two equal cells (Fig. 2.19). Initially the bacterial cell reaches a critical mass in its structure and cellular constituents. [...]