Biology · Microbes in Human Welfare · NEET
No. NCERT states directly that although some microbes cause disease in humans, animals, and plants, this should not make you think all microbes are harmful. Many microbes are useful in diverse ways. For example, they help make curd, bread, cheese, antibiotics, biogas, and they clean sewage water. Only a small number cause disease.
There is no real difference. Microbe and microorganism mean the same thing. Both words describe an organism too small to be seen by the naked eye. NCERT uses microbe and micro-organism as the same term.
Yes, in NCERT. The chapter lists microbes as protozoa, bacteria, fungi, microscopic animal and plant viruses, viroids, and also prions (which are proteinaceous infectious agents). So viruses, viroids, and prions are included as microbes here, even though viruses and prions are not truly cellular living organisms. Learn this exact NCERT list for NEET.
A single microbe cannot be seen. But when bacteria and many fungi are grown on a nutritive medium, they multiply into colonies. These colonies are large groups of cells and can be seen with the naked eye. Such cultures are used to study microorganisms.
Microbes are found across several kingdoms: bacteria belong to Monera, protozoa and some algae to Protista, and many microscopic forms to Fungi. Viruses, viroids, and prions are acellular and are not placed in the five kingdoms. Microbes are not a single group; they are a size-based mix from many kingdoms.
Try the real previous-year questions from this chapter — each with the answer and a full solution.
A microbe is any living organism too small to be seen without a microscope, such as bacteria, fungi, protozoa, and microscopic viruses.
Because most microbes help humans. They make curd, bread, cheese, antibiotics, and biogas, and they treat sewage. Only a few microbes cause disease.
Microbes are present everywhere: in soil, water, air, inside our bodies, and even in extreme places like thermal vents at very high temperature, under thick snow, and in highly acidic areas.
Yes. The chapter Microbes in Human Welfare is high yield. Understanding what a microbe is forms the base for products, sewage treatment, biogas, biocontrol, and biofertilisers questions.
