#microbiology

BOTANY

Which of the following bacteria is commonly used for lactic acid production?

Lactobacillus is widely used in the production of lactic acid and is important in dairy fermentation. 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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BOTANY

Which bacteria are primarily responsible for nitrogen fixation in leguminous plants?

Rhizobium forms symbiotic relationships with leguminous plants and helps in nitrogen fixation. 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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BOTANY

Which group of organisms reproduce primarily through binary fission?

Bacteria, which belong to Kingdom Monera, reproduce mainly by binary fission. 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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BOTANY

Which of the following statements about cyanobacteria is incorrect?

Cyanobacteria are prokaryotic and lack a well-defined nucleus. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept, Topic: Plant structure, physiology and applications.

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BOTANY

Which of the following microbial processes results in the production of methane in biogas plants?

Methanogenesis is the process by which methanogenic bacteria produce methane in biogas plants. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.

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BOTANY

Which bacterial structure helps in attachment to host tissues?

Pili are small, bristle-like structures on the bacterial surface that help in attachment to host tissues. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.

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ZOOLOGY

Which of the following diseases is caused by a bacterial infection?

Typhoid is a bacterial disease caused by Salmonella typhi, which spreads through contaminated food and water. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Human Health and Disease, Topic: Immunity, diseases and health maintenance.

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BOTANY

Which microorganism is used in the fermentation of bamboo shoots?

Lactobacillus helps in the fermentation of bamboo shoots, making them more digestible. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept, Topic: Plant structure, physiology and applications.

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BOTANY

Which structure in a bacterial ll is responsible for genetic exchange?

Plasmids are small, circular DNA molecules that can be exchanged between bacteria, enabling genetic recombination. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept, Topic: Plant structure, physiology and applications.

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BOTANY

What is the primary function of the bacterial capsule?

The bacterial capsule provides protection against phagocytosis by host immune lls. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept, Topic: Plant structure, physiology and applications.

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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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ZOOLOGY

Which of the following serves as a molecular carrier for gene transfer in bacteria?

Plasmids are extra-chromosomal DNA molecules used as vectors to carry and transfer genes in bacteria. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function, Topic: Structural organization and physiology.

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