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Microbes in Human Welfare- Quick Revision Video Lecture | Biology Class 12 - NEET

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FAQs on Microbes in Human Welfare- Quick Revision Video Lecture - Biology Class 12 - NEET

1. What are the roles of microbes in human welfare?
Ans. Microbes play several vital roles in human welfare, including their use in the production of antibiotics, vitamins, and enzymes. They are essential in the fermentation process for food production (like yogurt, cheese, and bread), in wastewater treatment to decompose organic matter, and in agriculture to enhance soil fertility through nitrogen fixation.
2. How do microbes contribute to the production of antibiotics?
Ans. Microbes, particularly bacteria and fungi, are the primary sources of many antibiotics. For example, Penicillium fungi produce penicillin, which is effective against bacterial infections. Researchers isolate these compounds from microbes and use them to develop medications that treat various infections and diseases in humans.
3. What is the significance of microbes in biotechnology?
Ans. Microbes are crucial in biotechnology as they are used in genetic engineering, bioremediation, and the production of biofuels. They can be genetically modified to produce desired substances, such as insulin or enzymes for industrial processes, and can also be employed to clean up environmental pollutants through bioremediation techniques.
4. How do microbes aid in agriculture?
Ans. Microbes contribute to agriculture by enhancing soil health and fertility. Certain bacteria and fungi form symbiotic relationships with plants, promoting nutrient uptake (like mycorrhizal fungi), nitrogen fixation (like Rhizobium), and pest control. These beneficial microbes improve crop yields and reduce the need for chemical fertilizers and pesticides.
5. What are some harmful effects of microbes on human health?
Ans. While many microbes are beneficial, some can cause diseases in humans. Pathogenic bacteria, viruses, fungi, and parasites can lead to infections and illnesses, ranging from mild to severe. Examples include tuberculosis caused by Mycobacterium tuberculosis and foodborne illnesses caused by Salmonella. It's essential to maintain hygiene and sanitation to prevent these infections.
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