#microbes

BOTANY

Which of the following microbes is involved in the nitrogen-fixation process?

Rhizobium is a symbiotic nitrogen-fixing bacterium that forms nodules on leguminous plant roots. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -

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Microbes in Human Welfare - Overview and Significance

Which of the following microbes is commonly used in the bioremediation of oil spills?

Pseudomonas species can degrade petroleum hydrocarbons and are used in oil spill bioremediation.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes in Human Welfare - Overview and Significance

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Microbes in Human Welfare - Overview and Significance

Which of the following microbes is used for bioremediation of oil spills?

Pseudomonas species are capable of degrading petroleum and are used in bioremediation of oil spills.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes in Human Welfare - Overview and Significance

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Microbes in Human Welfare - Overview and Significance

Which of the following is NOT a function of microbes in human welfare?

Microbes play a crucial role in human welfare, but they do not directly cause pollution. Instead, they help in biodegradation and sewage treatment.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes in Human Welfare - Overview and Significance

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Microbes in Human Welfare - Overview and Significance

Which of the following microbes is used for clarifying bottled fruit juices?

Pectinase is used to break down pectin in fruit juices, making them clearer.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes in Human Welfare - Overview and Significance

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Microbes in Human Welfare - Overview and Significance

Which of the following microbes is commonly used in the fermentation of traditional foods like soy sauce?

Aspergillus species are used in the fermentation process to produce soy sauce.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes in Human Welfare - Overview and Significance

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Microbes as Biofertilizers - Rhizobium Azospirillum Mycorrhiza Cyanobacteria

Which of the following microbes is commonly used in the bioremediation of oil spills?

Pseudomonas species can degrade petroleum and are used in the bioremediation of oil spills.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes as Biofertilizers - Rhizobium Azospirillum Mycorrhiza Cyanobacteria

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Microbes as Biofertilizers - Rhizobium Azospirillum Mycorrhiza Cyanobacteria

Which of the following microbes is involved in nitrogen fixation?

Rhizobium is a symbiotic nitrogen-fixing bacterium found in root nodules of leguminous plants.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes as Biofertilizers - Rhizobium Azospirillum Mycorrhiza Cyanobacteria

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Microbes as Biofertilizers - Rhizobium Azospirillum Mycorrhiza Cyanobacteria

Which of the following microbes is commonly used for biofertilization in paddy fields?

Nostoc, a cyanobacterium, fixes atmospheric nitrogen and improves soil fertility in paddy fields.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes as Biofertilizers - Rhizobium Azospirillum Mycorrhiza Cyanobacteria

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Microbes as Biofertilizers - Rhizobium Azospirillum Mycorrhiza Cyanobacteria

Which microbe is responsible for nitrogen fixation in root nodules of leguminous plants?

Rhizobium forms a symbiotic relationship with leguminous plants and fixes atmospheric nitrogen.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes as Biofertilizers - Rhizobium Azospirillum Mycorrhiza Cyanobacteria

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Microbes as Biocontrol Agents - Bt Baculovirus Trichoderma

Which of the following microbes is used in the biological control of butterfly caterpillars?

Bacillus thuringiensis produces toxins that kill butterfly caterpillars, making it a biocontrol agent.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes as Biocontrol Agents - Bt Baculovirus Trichoderma

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Microbes as Biocontrol Agents - Bt Baculovirus Trichoderma

Which of the following microbes is commonly used for biological control of plant pathogens?

Trichoderma is a fungal biocontrol agent used to suppress plant pathogens.

Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes as Biocontrol Agents - Bt Baculovirus Trichoderma

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