Viruses and Bacteria

Prime purpose of this lecture is to present on Viruses and Bacteria. A virus is a biological agent that reproduces inside the cells of living hosts. Hee briefly present on the Structure of a Virus. Bacteria constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Finally focus on various bacterium shapes.