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Microbes in Human Welfare
In which way have microbes played a major role in controlling diseases...

In which way have microbes played a majo | Class 12 Biology Chapter Microbes in Human Welfare, Microbes in Human Welfare NCERT Solutions

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Microbes in Human Welfare. This page offers a step-by-step solution to the specific question from Exercise 1, Question 5: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 5: In which way have microbes played a major role in controlling diseases caused by harmful bacteria?

Answer:

Several micro-organisms are used for preparing medicines. Antibiotics are medicines produced by certain micro-organisms to kill other disease-causing micro-organisms. These medicines are commonly obtained from bacteria and fungi. They either kill or stop the growth of disease-causing micro-organisms. Streptomycin, tetracycline, and penicillin are common antibiotics. Penicillium notatumproduces chemical penicillin, which checks the growth of staphylococci bacteria in the body. Antibiotics are designed to destroy bacteria by weakening their cell walls. As a result of this weakening, certain immune cells such as the white blood cells enter the bacterial cell and cause cell lysis. Cell lysis is the process of destroying cells such as blood cells and bacteria.

Other Questions of Chapter Microbes in Human Welfare

Which type of food would have lactic acid bacteria. Discuss their useful application.

Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter.
Discuss.

Q: Name any two species of fungus, which are used in the production of the antibiotics.

Q: How do biofertilisers enrich the fertility of the soil?

Why is distillation required for producing certain alcoholic drinks?

Name a microbe used for statin production. How do statins lower blood cholesterol level?

What would happen if our intestine harbours microbial flora exactly similar to that found in the rumen of cattle?

How was penicillin discovered?

Q: What is the key difference between primary and secondary sewage treatment?

Describe the main ideas behind the biological control of pests and diseases.

Popular questions of class 12 Biology

Q: What is spermatogenesis? Briefly describe the process of spermatogenesis.

Q: Why is reproduction essential for organisms? Answer

Q: Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals.

Q: With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

Q: What is DNA fingerprinting? Mention its application.

Q: What is oogenesis? Give a brief account of oogenesis.

Q: Describe the structure of a seminiferous tubule.

Q: What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Q: With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.

Q: Explain the Law of Dominance using a monohybrid cross.

Recently Viewed Questions of Class 12 Biology

Taking examples under each category, discuss upstream and downstream processing.

Name the first transgenic cow. Which gene was introduced in this cow?

Q: Diagrammatically represent the experimental steps in cloning and expressing an human gene (say the gene for growth hormone) into a bacterium like E. coli ?

Q: Explain what is meant by biofortification.

What is the main idea behind “Joint Forest Management Concept” introduced by the Government of India?

Q: List two essential roles of ribosome during translation.

Q: If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population?

Q: Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.)

Give the full form of ELISA. Which disease can be detected using it? Discuss the principle underlying the test.

Q: Explain briefly
(a) PCR
(b) Restriction enzymes and DNA
(c) Chitinase

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Microbes in Human Welfare.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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