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Biological Classification Questions

Practice 86 Biological Classification questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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86
Total Questions
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44
Easy
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38
Medium
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4
Hard
Practice by Exam:Biology(79)BIOLOGY(4)Botany(2)General Intelligence & Reasoning(1)

About Biological Classification — practice questions, PYQs & concepts

Biological Classification is a frequently-tested topic on Biology, BIOLOGY, Botany. ExamTest.live currently lists 86 Biological Classification questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Biological Classification weight in competitive exams

Across our Biological Classification question bank, the largest sources are Biology (79), BIOLOGY (4), Botany (2) and General Intelligence & Reasoning (1). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 44 easy Biological Classification questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
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All Biological Classification Questions(1–86 of 86)

Filter:
Q1mediummcqBiologyNEET 20212026
0% accuracy
Which of the following statements is correct?
Q2easymcqBiologyNEET (UG) 20172026
0% accuracy
Viroids differ from viruses in having:
Q3mediummcqBiologyNEET 20192026
0% accuracy
Which of the following statements is incorrect?
Q4mediummcqBiologyNEET 20192026
0% accuracy
Which is of the following statements is incorrect?
Q5easymcqBiologyNEET 20192026
0% accuracy
Match Column-I with Column-II:Column-I(a) Saprophyte(b) Parasite(c) Lichens(d) MycorrhizaColumn-II(i) Symbiotic association of fungi with plant roots(ii) Decomposition of dead organic materials(iii) Living on living plants or animals(iv) Symbiotic association of algae and fungi
Q6easymcqBiologyNEET (UG) 20172026
0% accuracy
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
Q7easymcqBiologyNEET (UG) 20172026
0% accuracy
Which of the following are found in extreme saline conditions?
Q8easymcqBiologyNEET (UG) 20172026
0% accuracy
Which of the following represents order of 'Horse'?
Q9mediummcqBiologyNEET (UG) 20172026
0% accuracy
Select the mismatch:
Q10mediummcqGeneral Intelligence & ReasoningCompetitive Exam Practice2026
0% accuracy
Select the option that is related to the third term in the same way as the second term is related to the first term.Man : Mammals :: Snake : ?
Q11mediummcqBiologyNEET (UG) 20182026
Which among the following is not a prokaryote?
Q12easymcqBiologyNEET 20172026
Viroids differ from viruses in having:
Q13easymcqBiologyNEET 20172026
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
Q14mediummcqBiologyNEET (UG) 20182026
Select the wrong statement:
Q15hardmcqBiologyNEET (UG) 20182026
After karyogamy followed by meiosis, spores are produced exogenously in:
Q16hardmcqBiologyNEET (UG) 20182026
Ciliates differ from all other protozoans in:
Q17mediummcqBiologyNEET 20172026
Select the mismatch:
Q18easymcqBiologyNEET 20172026
Which of the following are found in extreme saline conditions?
Q19easymcqBIOLOGYNEET 20192026
Which of the following statements about methanogens is not correct?
Q20mediummatch/followingBotanyNEET 2024 R1@NUM: 1182026
Match List I with List II:
Q21mediummcqBotanyNEET 2024 R1@NUM: 1152026
Which one of the following is NOT a criterion for classification of fungi?
Q22mediummcqBiologyNEET 20222026
Which of the following is a correct statement?
Q23mediummcqBiologyNEET 20222026
Given below are two statements:Statement I: Mycoplasma can pass through less than micron filter size.Statement II: Mycoplasma are bacteria with a cell wall.In the light of the above statements, choose the most appropriate answer from the options given below:
Q24easymcqBiologyNEET 20222026
In the taxonomic categories which hierarchical arrangement in ascending order is correct in the case of animals?
Q25easymcqBiologyNEET 20222026
Identify the asexual reproductive structure associated with Penicillium:
Q26easymcqBiologyNEET 20212026
Which one of the following belongs to the family Muscidae?
Q27easymcqBiologyNEET (UG) 20182026
Which of the following organisms are known as chief producers in the oceans?
Q28easymcqBIOLOGYNEET 20192026
Match the organisms in Column-I with habitats in Column-II.Column-I: (a) Halophiles, (b) Thermoacidophiles, (c) Methanogens, (d) CyanobacteriaColumn-II: (i) Hot springs, (ii) Aquatic environment, (iii) Guts of ruminants, (iv) Salty areas
Q29easymcqBiologyNEET 2020 E12026
Which of the following is correct about viroids?
Q30easymcqBIOLOGYNEET 20192026
Which of the following is against the rules of ?
Q31easymcqBIOLOGYNEET 20192026
Mad cow disease in cattle is caused by an organism which has:
Q32mediummcqBiologyBiology
0% accuracy
Which one of the following is wrongly matched?
Q33mediummcqBiologyBiology
0% accuracy
Which one of the following animals is correctly matched with its particular named taxonomic category?
Q34mediummcqBiologyBiology
0% accuracy
Organisms called Methanogens are most abundant in a:
Q35mediummcqBiologyBiology
100% accuracy
Which of the following taxonomic categories is more specific than Family but broader than Species?
Q36mediummcqBiologyBiology
Select the wrong statement:
Q37easymcqBiologyBiology
Select the wrong statement.
Q38easymcqBiologyBiology
Methanogens belong to:
Q39easymcqBiologyBiology
Which one of the following is wrong for fungi?
Q40easymcqBiologyBiology
One of the major components of cell wall of most fungi is:
Q41easymcqBiologyBiology
The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:
Q42easymcqBiologyBiology
Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom:
Q43easymcqBiologyBiology
Which of the following statements is wrong for viroids?
Q44easymcqBiologyBiology
Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature?
Q45easymcqBiologyBiology
Pick up the wrong statement:
Q46hardmcqBiologyBiology
Thermococcus, Methanococcus and Methanobacterium exemplify:
Q47mediummcqBiologyBiology
Some hyperthermophilic organisms that grow in highly acidic () habitats belong to the two groups:
Q48easymcqBiologyBiology
Virus envelope is known as:
Q49mediummcqBiologyBiology
Which of the following is a symbiotic nitrogen fixer?
Q50easymcqBiologyBiology
Mannitol is the stored food in:
Q51hardmcqBiologyBiology
Which one of the following has haplontic life cycle?
Q52easymcqBiologyBiology
Phylogenetic system of classification is based on:
Q53mediummcqBiologyBiology
Oxygenic photosynthesis occurs in:
Q54easymcqBiologyBiology
T.O. Diener discovered a:
Q55easymcqBiologyBiology
In the three-domain system, which statement is true about Archaea?
Q56mediummcqBiologyBiology
Cellulose is the major component of the cell walls of:
Q57mediummcqBiologyBiology
Infectious proteins are present in:
Q58mediummcqBiologyBiology
Which one of the following statements about mycoplasma is wrong?
Q59mediummcqBiologyBiology
Which pair of the following belongs to Basidiomycetes?
Q60mediummcqBiologyBiology
Two plants can be conclusively said to belong to the same species if they:
Q61mediummcqBiologyBiology
Ergot of rye is caused by a species of:
Q62mediummcqBiologyBiology
Which of the following is a slime mould?
Q63easymcqBiologyBiology
The causative agent of mad-cow disease is a:
Q64mediummcqBiologyBiology
Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread ?A) The temperature of about B) The temperature of about C) Relative humidity of about D) Relative humidity of about E) A shady placeF) A brightly illuminated placeChoose the answer from the following options:
Q65mediummcqBiologyBiology
What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?
Q66mediummcqBiologyBiology
The bacterium (Clostridium botulinum) that causes botulism is:
Q67easymcqBiologyBiology
The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as:
Q68mediummcqBiologyBiology
The structures that help some bacteria to attach to rocks and/or host tissues are:
Q69mediummcqBiologyBiology
The thalloid body of a slime mould (Myxomycetes) is known as :
Q70easymcqBiologyBiology
Chromatophores take part in:
Q71mediummcqBiologyBiology
In which group of organisms the cells walls form two thin overlapping shells which fit together?
Q72easymcqBiologyBiology
Cell wall is absent in:
Q73mediummcqBiologyBiology
Choose the wrong statement:
Q74easymcqBiologyBiology
The cyanobacteria are also referred to as:
Q75easymcqBiologyBiology
A nitrogen-fixing microbe associated with Azolla in rice fields is:
Q76easymcqBiologyBiology
Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?
Q77mediummcqBiologyBiology
The imperfect fungi which are decomposers of litter and help in mineral cycling belong to:
Q78mediummcqBiologyBiology
Which statement is WRONG for viruses?
Q79easymcqBiologyBiology
The highest number of species in the world is represented by:
Q80easymcqBiologyBiology
Maximum nutritional diversity is found in the group:
Q81easymcqBiologyBiology
Which one of the following organisms is scientifically correctly named?
Q82mediummcqBiologyBiology
How many organisms in the list given below are autotrophs?Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosoma, Porphyra, Wolffia
Q83easymcqBiologyBiology
In the five-kingdom classification, Chlamydomonas and Chlorella have been included in:
Q84easymcqBiologyBiology
One of the free-living anaerobic nitrogen-fixers is:
Q85mediummcqBiologyBiology
Algae have cell walls made up of:
Q86easymcqBiologyBiology
Single-celled eukaryotes are included in:

Frequently Asked Questions

How many Biological Classification questions are on ExamTest.live?▼
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Which exams include Biological Classification questions?▼
Biological Classification questions are commonly asked in Biology, BIOLOGY, Botany, General Intelligence & Reasoning. You can filter by exam using the links above.
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Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.