Tag «bacterium»

Viruses

Introduction Viruses are still biologists’ puzzle because they show both living and nonliving characters. Hence viruses are regarded as a separate entity. It is not taken into account in Whittaker’s five kingdom classification. Viruses are now defined as ultramicroscopic, disease causing intra cellular obligate parasites. Brief history of discovery Viruses were not known to biologists …

Manufacture of Cheese

Traditional cheese making depended on the natural micro-organisms present in the dairy and milk. Microbes sour that milk, producing lactic acid and lowering the pH, so that when rennet (from the stomach of young mammals) was added, the milk curdled and separated into solid curds and liquid why (which was used as a substitute for …