Question

Question 7
Write 10 lines on the usefulness of microorganisms in our lives.

Answer 1

Microorganisms:

1. The small sized organisms that can not be seen by naked eyes are called microorganisms.
2. These can only be viewed under microscope.
3. These include bacteria, microscopic fungi, protista and protozoa.

Usefulness of microorganisms:

1. Lactobacillus is used to form curd from milk.
2. Rhizobium present in the roots of pulse plants fix nitrogen from the air and supply nitrogen compounds to the pulse plants.
3. Micro-organisms are also used in wine making, baking, pickling, and other food making processes.
4. Alcoholic fermentation by yeast is widely used in the preparation of wine and bread.
5. Microbes are used to reduce pollution. For example, decomposers such as bacteria and fungi break down dead bodies and excreta to form inorganic compounds, which can be absorbed by plants.
6. Microbes also play an important role in the preparation of medicines. Antibiotics are chemicals produced by micro-organisms to kill bacteria. Penicillin is an antibiotic made from Penicillium.
7. Bacteria present in our intestine helps in proper digestion and release Vitamin B which is absorbed by the intestine.
8. Many vaccines are prepared from micro-organisms. These vaccines are given to children to protect them from disease.
9. Certain microbes are also used in the biological treatment of sewage and industrial effluents.
10. Yeast is used in making idli, bhaturas, bread, pastries and cakes.