NEET Biology · Chapter-wise PYQs

Biological Classification NEET PYQs (2005–2026) with Solutions

Biological Classification has appeared in 11 of the 22 NEET and AIPMT papers from 2005 to 2026, with 32 questions in all: about 1.5 per paper on average. The last five papers (2022–2026) had 6 questions from it.

The most-asked topics are Monera (9), Protista (7) and Fungi (6).

NEET MIND's syllabus map rates Biological Classification as medium weightage: about 2 questions (8 marks) in a NEET paper.

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Free account: 15 PYQs from Biological Classification with explanations and progress tracking. Premium unlocks all 32.

PYQs in this chapter
32
Papers it appeared in
11 of 22
Average per paper
1.5
NEET weightage
Medium

10 solved Biological Classification PYQs

Real NEET and AIPMT questions from this chapter, newest first. Try each one, then open the answer and the step-by-step explanation.

  1. Question 1 (NEET 2026)

    NEET 2026EasyLichens as symbiotic associations
    Symbiotic association between fungi and algae are called ________.
    1. Option A: lichens
    2. Option B: sponges
    3. Option C: mycorrhiza
    4. Option D: chrysophytes
    Show answer & explanation

    Correct answer: (A) lichens

    Explanation

    Lichens are symbiotic associations, i.e. mutually useful associations, between algae and fungi. The algal component (phycobiont) is autotrophic and prepares food, while the fungal component (mycobiont) provides shelter and absorbs mineral nutrients and water. Mycorrhiza is an association of fungi with the roots of higher plants, sponges are animals (phylum Porifera), and chrysophytes are protists such as diatoms and desmids. Hence the answer is option (A).

  2. Question 2 (NEET 2026)

    NEET 2026EasyViruses, viroids and prions
    Mad cow disease is caused by _______.
    1. Option A: prions
    2. Option B: viroids
    3. Option C: Aspergillus sp.
    4. Option D: Mycoplasma sp.
    Show answer & explanation

    Correct answer: (A) prions

    Explanation

    Prions are infectious agents made of abnormally folded protein. NCERT notes that the most notable prion diseases are bovine spongiform encephalopathy (BSE), commonly called mad cow disease, in cattle and its human analogue, Creutzfeldt-Jakob disease (CJD). Viroids are free RNA infectious agents (for example, potato spindle tuber disease), Aspergillus is a fungus and Mycoplasma is a wall-less bacterium; none of them causes mad cow disease. Hence the answer is option (A).

  3. Question 3 (NEET 2026)

    NEET 2026EasyKingdom Monera: bacterial shapes
    Match List-I with List-II. List-I: A. Spherical B. Rod C. Comma D. Spirillum List-II: I. Vibrio II. Cocci III. Spirilla IV. Bacilli Choose the correct answer from the options given below :
    1. Option A: A-I, B-III, C-II, D-IV
    2. Option B: A-III, B-II, C-I, D-IV
    3. Option C: A-II, B-I, C-IV, D-III
    4. Option D: A-II, B-IV, C-I, D-III
    Show answer & explanation

    Correct answer: (D) A-II, B-IV, C-I, D-III

    Explanation

    NCERT groups bacteria into four categories based on shape: Spherical bacteria are Coccus (pl. cocci), so A-II. Rod-shaped bacteria are Bacillus (pl. bacilli), so B-IV. Comma-shaped bacteria are Vibrio (pl. vibrio), so C-I. Spiral bacteria are Spirillum (pl. spirilla), so D-III. The matching A-II, B-IV, C-I, D-III is option (D).

  4. Question 4 (NEET 2026)

    NEET 2026EasyProkaryotes versus eukaryotes
    Which of the following is not a prokaryote?
    1. Option A: Bacteria
    2. Option B: Blue green algae
    3. Option C: Mycoplasma
    4. Option D: Fungi
    Show answer & explanation

    Correct answer: (D) Fungi

    Explanation

    Prokaryotic cells are represented by bacteria, blue-green algae (cyanobacteria), mycoplasma and PPLO (pleuro pneumonia like organisms); all of these are placed in kingdom Monera. Fungi have a well-defined nucleus and membrane-bound organelles, so they are eukaryotes (kingdom Fungi). Hence the answer is option (D).

  5. Question 5 (NEET 2026)

    NEET 2026EasySexual cycle in fungi
    Match List-I with List-II. List-I: A. Fusion of protoplasms between gametes B. Fusion of two nuclei C. Generation of haploid spores List-II: I. Meiosis II. Plasmogamy III. Karyogamy Choose the correct answer from the options given below :
    1. Option A: A-II, B-III, C-I
    2. Option B: A-II, B-I, C-III
    3. Option C: A-III, B-II, C-I
    4. Option D: A-I, B-III, C-II
    Show answer & explanation

    Correct answer: (A) A-II, B-III, C-I

    Explanation

    The sexual cycle in fungi involves three steps (NCERT): (i) Fusion of protoplasms between two motile or non-motile gametes is called plasmogamy, so A-II. (ii) Fusion of two nuclei is called karyogamy, so B-III. (iii) Meiosis in the zygote results in haploid spores, so C-I. The matching A-II, B-III, C-I is option (A).

  6. Question 6 (NEET 2026)

    NEET 2026EasyFive Kingdom Classification
    The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker (1969) included: A. Cell structure B. Body organization C. Presence of flagellum D. Reproduction E. Phylogenetic relationships Choose the correct answer from the options given below :
    1. Option A: A, B, C, D and E
    2. Option B: B, C and D only
    3. Option C: A, B, D and E only
    4. Option D: A, B and E only
    Show answer & explanation

    Correct answer: (C) A, B, D and E only

    Explanation

    Whittaker’s five kingdom classification was based on cell structure, body organization, mode of nutrition, reproduction and phylogenetic relationships. Presence of flagellum was not a criterion.

  7. Question 7 (NEET 2018)

    NEET 2018EasyProtista
    Which of the following organisms are known as chief producers in the oceans?
    1. Option A: Dinoflagellates
    2. Option B: Diatoms
    3. Option C: Euglenoids
    4. Option D: Cyanobacteria
    Show answer & explanation

    Correct answer: (B) Diatoms

    Explanation

    Diatoms are the chief primary producers in oceans. They form a major component of phytoplankton and contribute significantly to marine food chains. Hence, option (B) is correct.

  8. Question 8 (NEET 2018)

    NEET 2018MediumProtista
    Ciliates differ from all other protozoans in:
    1. Option A: using flagella for locomotion
    2. Option B: having a contractile vacuole for removing excess water
    3. Option C: having two types of nuclei
    4. Option D: using pseudopodia for capturing prey
    Show answer & explanation

    Correct answer: (C) having two types of nuclei

    Explanation

    Ciliates such as Paramecium possess two types of nuclei: - Macronucleus - Micronucleus This feature distinguishes them from other protozoans. Hence, option (C) is correct.

  9. Question 9 (NEET 2018)

    NEET 2018EasyMonera
    Which among the following is not a prokaryote?
    1. Option A: Saccharomyces
    2. Option B: Mycobacterium
    3. Option C: Oscillatoria
    4. Option D: Nostoc
    Show answer & explanation

    Correct answer: (A) Saccharomyces

    Explanation

    Saccharomyces (yeast) is a unicellular fungus and therefore a eukaryote. Mycobacterium is a bacterium, while Oscillatoria and Nostoc are cyanobacteria, all of which are prokaryotes. Hence, option (A) is correct.

  10. Question 10 (NEET 2018)

    NEET 2018MediumFungi
    After karyogamy followed by meiosis, spores are produced exogenously in
    1. Option A: Neurospora
    2. Option B: Alternaria
    3. Option C: Saccharomyces
    4. Option D: Agaricus
    Show answer & explanation

    Correct answer: (D) Agaricus

    Explanation

    In Agaricus, a basidiomycete fungus, meiospores called basidiospores are produced exogenously on basidia after karyogamy and meiosis. Hence, option (D) is correct.

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