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Biological Classification NEET Questions with Answers
Preparing for the NEET 2025 exam requires a deep understanding of key topics like biological classification. This section holds significant weight in the NEET biology syllabus, making it crucial for students to practice thoroughly. Our collection of biological classification NEET questions with answers is designed to provide a comprehensive review of the chapter, ensuring that students can excel in this topic.
The biological classification NEET questions cover various important concepts such as the biological hierarchy, kingdom classification, and taxonomy. These concepts are frequently tested in the NEET exam biological classification section, making it important for aspirants to master them. Whether it’s Kingdom Monera NEET questions or questions on other kingdoms, this topic is integral to your preparation.
Here, you’ll find biological classification NEET questions topic-wise, including biological classification MCQs for NEET, which will help you test your knowledge effectively. You can also take part in a biological classification NEET questions mock test to simulate exam conditions. Additionally, we’ve provided a biological classification NEET questions PDF for easy offline study.
For those preparing for the NEET 2025 biology classification section, revisiting biological classification NEET questions pyq (previous year questions) is essential. By practicing these, you’ll get a clearer idea of the types of questions that may appear in the exam. The NEET biological classification practice questions are tailored to help students gain confidence and accuracy.
Top 10 Important Biological Classification NEET Questions and Answers
Here are the top 10 most important Biological Classification NEET questions and answers:
1. This component provides a sticky character to bacterial cell (NEET 2017)
A. Glycocalyx
B. Nuclear membrane
C. Cell wall
D. Plasma membrane
Answer: A. Glycocalyx
Explanation: Glycocalyx is a gelatinous outer layer of the bacterial cell that provides adhesion to surfaces and helps the bacterium evade the immune system, giving it a sticky characteristic.
2. Pick the incorrect statement (NEET-II 2016)
A. Diatoms are microscopic and float in water passively
B. Diatoms are chief producers in oceans
C. Diatomaceous earth is formed by the cell walls of diatoms
D. Walls of diatoms are easily destructible
Answer: D. Walls of diatoms are easily destructible
Explanation: Diatom cell walls are made of silica, making them very hard and indestructible, forming diatomaceous earth. Hence, option D is incorrect.
3. The imperfect fungi that are decomposers of litter and help in mineral cycling belong to (2015)
A. Basidiomycetes
B. Deuteromycetes
C. Ascomycetes
D. Phycomycetes
Answer: B. Deuteromycetes
Explanation: Deuteromycetes are a group of fungi known as “imperfect fungi” due to their lack of a sexual stage. They decompose organic matter and contribute to nutrient cycling.
4. Pick the incorrect statement (2015)
A. Neurospora is used in the study of biochemical genetics
B. Penicillium is multicellular and produces antibiotics
C. Yeast is unicellular and used in fermentation
D. Morels and truffles are poisonous mushrooms
Answer: D. Morels and truffles are poisonous mushrooms
Explanation: Morels and truffles are edible and highly prized fungi, not poisonous. Hence, option D is incorrect.
5. A capsule is advantageous to a bacterium because (NEET 2013)
A. it allows the bacterium to attach to the surface
B. it allows the bacterium to “hide” from the host’s immune system
C. it protects means of locomotion
D. it protects the bacterium from desiccation
Answer: B. it allows the bacterium to “hide” from the host’s immune system
Explanation: The bacterial capsule helps avoid detection by the host’s immune system and increases the bacterium’s ability to cause disease.
6. The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorized as (2012)
A. heterotrophic bacteria
B. chemosynthetic autotrophs
C. archaebacteria
D. cyanobacteria
Answer: A. heterotrophic bacteria
Explanation: Heterotrophic bacteria are essential for fermentation (e.g., Lactobacillus in curd production) and antibiotic production.
7. The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of (Mains 2011)
A. Ascaris, a roundworm
B. Rhizopus, a mould
C. Wuchereria, a filarial worm
D. Taenia, a tapeworm
Answer: B. Rhizopus, a mould
Explanation: Microsporum, like Rhizopus, is a fungus, whereas the other organisms listed are worms.
8. Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to two groups (2010)
A. liverworts and yeasts
B. eubacteria and archaea
C. protists and mosses
D. cyanobacteria and diatoms
Answer: B. eubacteria and archaea
Explanation: Hyperthermophilic organisms that thrive in extreme environments such as acidic or hot conditions belong to eubacteria and archaea.
9. Pick the correct combination of statements (i-iv) regarding characteristics of some entities (Mains 2010)
i. Methanogens are archaebacteria that produce methane in marshy areas
ii. Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen
iii. Chemosynthetic autotrophic bacteria synthesize cellulose from glucose
iv. Mycoplasma lack a cell wall and can survive without oxygen
These are correct statements:
A. (ii) and (iii)
B. (i), (ii) and (iii)
C. (ii), (iii) and (iv)
D. (i), (ii) and (iv)
Answer: D. (i), (ii) and (iv)
Explanation: Methanogens, Nostoc, and Mycoplasma are correctly described. Chemosynthetic autotrophic bacteria do not synthesize cellulose, making (iii) incorrect.
10. Bacterial leaf blight of rice is caused by a species (2008)
A. Pseudomonas
B. Xanthomonas
C. Erwinia
D. Alternaria
Answer: B. Xanthomonas
Explanation: Xanthomonas is a genus of bacteria responsible for bacterial leaf blight in rice, a significant plant disease affecting crop yields.
Biological Classification NEET Questions PYQ for 2025
In the NEET exams of previous years, questions related to biological classification have tested students’ understanding of various taxonomic groups, their characteristics, and their ecological roles. Topics such as the five kingdom classification, the differences between prokaryotes and eukaryotes, and the importance of fungi and bacteria have frequently appeared in the question papers.
As students prepare for the NEET 2025 exam reviewing previous years’ questions on biological classification can provide valuable insights into the exam pattern and help reinforce essential concepts. This practice not only aids in identifying key areas of focus but also enhances students’ problem-solving skills in biology.
1. This component provides a sticky character to bacterial cell (NEET 2017)
A. Glycocalyx
B. Nuclear membrane
C. Cell wall
D. Plasma membrane
Answer: A. Glycocalyx
Explanation: The glycocalyx is a gelatinous outer layer that helps bacteria stick to surfaces and evade the immune system, giving it a sticky property.
2. Pick the incorrect statement (NEET-II 2016)
A. Diatoms are microscopic and float in water passively
B. Diatoms are chief producers in oceans
C. Diatomaceous earth is formed by the cell walls of diatoms
D. Walls of diatoms are easily destructible
Answer: D. Walls of diatoms are easily destructible
Explanation: Diatom walls are made of silica, which makes them tough and hard to destroy, forming diatomaceous earth. Therefore, option D is incorrect.
3. The imperfect fungi that are decomposers of litter and help in mineral cycling belong to (2015)
A. Basidiomycetes
B. Deuteromycetes
C. Ascomycetes
D. Phycomycetes
Answer: B. Deuteromycetes
Explanation: Deuteromycetes, also called imperfect fungi, decompose organic matter and play a role in nutrient cycling.
4. Pick the incorrect statement (2015)
A. Neurospora is used in the study of biochemical genetics
B. Penicillium is multicellular and produces antibiotics
C. Yeast is unicellular and used in fermentation
D. Morels and truffles are poisonous mushrooms
Answer: D. Morels and truffles are poisonous mushrooms
Explanation: Morels and truffles are edible fungi and not poisonous. Hence, option D is incorrect.
5. A capsule is advantageous to a bacterium because (NEET 2013)
A. It allows the bacterium to attach to the surface
B. It allows the bacterium to “hide” from the host’s immune system
C. It protects means of locomotion
D. It protects the bacterium from desiccation
Answer: B. It allows the bacterium to “hide” from the host’s immune system
Explanation: The capsule allows bacteria to evade the immune system, enhancing its survival in the host.
6. The most abundant prokaryotes helpful to humans in making curd from milk and in the production of antibiotics are the ones categorized as (2012)
A. Heterotrophic bacteria
B. Chemosynthetic autotrophs
C. Archaebacteria
D. Cyanobacteria
Answer: A. Heterotrophic bacteria
Explanation: Heterotrophic bacteria like Lactobacillus are used in fermentation (curd production) and in making antibiotics.
7. The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of (Mains 2011)
A. Ascaris, a roundworm
B. Rhizopus, a mould
C. Wuchereria, a filarial worm
D. Taenia, a tapeworm
Answer: B. Rhizopus, a mould
Explanation: Microsporum, like Rhizopus, belongs to the fungal kingdom, whereas the other organisms are worms.
8. Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to two groups (2010)
A. Liverworts and yeasts
B. Eubacteria and archaea
C. Protists and mosses
D. Cyanobacteria and diatoms
Answer: B. Eubacteria and archaea
Explanation: Hyperthermophilic organisms that thrive in extreme conditions, such as high acidity, belong to the groups of eubacteria and archaea.
9. Pick the correct combination of statements (i-iv) regarding characteristics of some entities (Mains 2010)
i. Methanogens are archaebacteria that produce methane in marshy areas
ii. Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen
iii. Chemosynthetic autotrophic bacteria synthesize cellulose from glucose
iv. Mycoplasma lack a cell wall and can survive without oxygen
A. (ii) and (iii)
B. (i), (ii), and (iii)
C. (ii), (iii), and (iv)
D. (i), (ii), and (iv)
Answer: D. (i), (ii), and (iv)
Explanation: Statements (i), (ii), and (iv) are correct. Chemosynthetic autotrophic bacteria do not synthesize cellulose, making statement (iii) incorrect.
10. Bacterial leaf blight of rice is caused by a species (2008)
A. Pseudomonas
B. Xanthomonas
C. Erwinia
D. Alternaria
Answer: B. Xanthomonas
Explanation: Xanthomonas is the bacterium responsible for causing bacterial leaf blight in rice.
11. The entity providing rigidity and protection to bacterial cells is (NEET 2016)
A. Cell membrane
B. Glycocalyx
C. Cell wall
D. Ribosomes
Answer: C. Cell wall
Explanation: The bacterial cell wall provides structural support and protection to the cell.
12. The group of organisms responsible for the majority of oxygen production on Earth includes (NEET 2015)
A. Cyanobacteria
B. Rhizobium
C. E. coli
D. Fungi
Answer: A. Cyanobacteria
Explanation: Cyanobacteria are photosynthetic bacteria that contribute significantly to the Earth’s oxygen supply.
13. Mycorrhiza, a symbiotic association between fungi and plant roots, helps plants by (NEET 2016)
A. Enhancing nutrient absorption
B. Providing structural support
C. Increasing photosynthetic efficiency
D. Protecting against herbivores
Answer: A. Enhancing nutrient absorption
Explanation: Mycorrhizae improve the plant’s absorption of water and nutrients, particularly phosphorus.
14. The bacteria involved in converting nitrogen gas into a usable form for plants are known as (NEET 2014)
A. Nitrosomonas
B. Rhizobium
C. Azotobacter
D. Nitrobacter
Answer: B. Rhizobium
Explanation: Rhizobium bacteria fix atmospheric nitrogen into a form that plants can use, such as ammonia.
15. The fungal group primarily involved in the decomposition of cellulose and lignin is (NEET 2012)
A. Ascomycetes
B. Basidiomycetes
C. Deuteromycetes
D. Zygomycetes
Answer: B. Basidiomycetes
Explanation: Basidiomycetes are fungi that specialize in breaking down tough organic materials like cellulose and lignin.
