Question

4 useful role of bacteria ...​

Answer 1

Answer:

4 useful role of bacteria :-

• Creating products, such as ethanol and enzymes.
• Making drugs, such as antibiotics and vaccines.
• Making biogas, such as methane.
• Cleaning up oil spills and toxic wastes.

Answer 2

Explanation:

Bacteria work as natural scavengers as they are able to decay huge amount of plant, animal and human waste.

Using biotechnology techniques, bacteria can also be bioengineered for the production of therapeutic proteins, such as insulin, growth factors or antibodies.

Some bacteria living in the gut of cattle, horses and other herbivores secrete cellulase, an enzyme that helps in the digestion of the cellulose contents of plant cell walls. Cellulose is the major source of energy for these animals. generally plant cells contain cellulose.the bacteria present in the stomach of cattle will help in the digestion of cellulose.

Escherichia coli that live in the human large intestine synthesize vitamin B and release it for human use. Similarly, Clostridium butyclicum is used for commercial preparation of riboflavin, and vitamin B.

Bacillus thuringiensis (also called BT), a Gram-positive, soil dwelling bacterium is used for Pest Control and producing Bt crops.

Bioremediation techniques such as Oil zapper use bacteria.

Many antibiotics are used from bacteria. Some of them are Bacitracin, Polymyxin B, Streptomycine, Erythromycine, neomycin-B, Chloramophenicol etc.

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Pleasant smell of the earth after the first shower

Pleasant smell of the earth after the first shower (earthy odour) is caused by the production of a series of streptomycete metabolites called geosmins.

These substances are sesquiterpenoid compounds and unsaturated compound of carbon, oxygen and hydrogen. The geosmins first discovered has the chemical name trans-1, 10-dimethyl-trans-9-decalol; however, other volatile products produced by certain species of Streptomyces may also be responsible for the characteristic smell.