Wine and bear are produced without distillation whereas whisky, brandy and rum are produced by distillation of the fermented broth.ī. Fermented Beverages- Saccharomyces cerevisiae used for bread-making and commonly called brewer’s yeast, is used for fermenting malted cereals and fruit juices, to produce beverages like wine, bear, whisky and rum. Production on large scale requires growing microbes in very large vessels called fermenters.Ī. The ‘Roquefort cheese’ is ripened by growing a specific fungus on them for a particular flavour.Ī number of products like beverages and antibiotics involve uses of microbes. The large holes in ‘Swiss cheese’ are due to production of a large amount of CO2 by a bacterium named Propionibacterium sharmanii. The dough used for making bread is fermented using baker’s yeast (Saccharomyces cervisiae).Ĭ. Cheese, is one of the oldest food items in which microbes were used. The puffed-up appearance of dough is due to the production of CO2 gas. In our stomach too, the LAB play very beneficial role in checking disease causing microbes.ī. The dough is used for making foods such as dosa and idli is fermented by bacteria. It also improves its nutritional quality by increasing vitamin B12. The LAB produces acids that coagulate and partially digest the milk proteins. Several microorganisms are useful to man in diverse ways.Ī. Microorganisms like Lactobacillus and other commonly called lactic acid bacteria (LAB) grow in milk and convert it to curd. Microbes cause many diseases in human beings, plants and animals. They are found everywhere on earth ranging from soil, air water and some inhabitable places.īacteria and fungi can be grown on nutritive media to form colonies, which can be seen by necked eyes and very useful in study of microorganisms. Microbes are diverse-protozoa, bacteria, fungi and microscopic plants viruses, viroid and also prions that are proteinacious infectious agents. Refer to Chapter 10 Microbes in Human Welfare Notes below which have been designed as per the latest syllabus issued by CBSE and will be very useful for upcoming examinations to help clear your concepts and get better marks in examinations. These will help you a lot to understand all the important topics given in your NCERT Class 12 Biology textbook. The below Class 12 Microbes in Human Welfare notes have been designed by expert Biology teachers. Students should revise these notes and go through important Class 12 Biology examination questions given below to obtain better marks in exams Microbes in Human Welfare Class 12 Biology Notes and Questions The Class 12 Biology Chapter wise notes have been prepared based on the latest syllabus issued for the current academic year by CBSE. Please refer to Microbes in Human Welfare Class 12 Biology Notes and important questions below.