NEET Biology Biological Classification MCQs Set 10

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Review structured MCQ sets for NEET Biology Biological Classification. Built according to official NEET guidelines, these downloadable questions support daily revision and core concept reinforcement.

Chapter-wise Objective Questions: Biological Classification

View or download the dedicated Biological Classification MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Biology evaluations.

Multiple Choice Questions

Question 1: Select incorrect statement about viroid :-
(a) Free infectious RNA
(b) It was discovered by T.O. Diener
(c) It causes potato spindle tuber disease
(d) It contains high molecular weight RNA
Show Answer & Explanation

Answer: (d) It contains high molecular weight RNA

Explanation:
1. Viroids have free RNA of low molecular weight and no protein coat.

Teacher's Note:
1. Viruses, viroids, prions and lichens are outside the five kingdoms.
2. Link each scientist with the discovery: Ivanowsky TMV, Beijerinck contagium vivum fluidum, Stanley crystals, Diener viroid.

Question 2: Which is incorrect statement ?
(a) The Mycoplasma are organisms that completely lack a cell wall
(b) Mycoplasma can survive without oxygen
(c) Mycoplasma are the smallest living cells.
(d) Mycoplasma are sensitive to penicillin
Show Answer & Explanation

Answer: (d) Mycoplasma are sensitive to penicillin

Explanation:
1. Mycoplasma are resistant to penicillin because they have no cell wall, so the statement is incorrect.

Teacher's Note:
1. Archaebacteria differ from eubacteria in cell wall chemistry and survive harsh habitats.
2. Protists are mainly aquatic and form a link with plants, animals and fungi.

Question 3: Endomycorrhizal fungus is :-
(a) Pythium
(b) Mucor
(c) Glomus
(d) Rhizopus
Show Answer & Explanation

Answer: (c) Glomus

Explanation:
1. Glomus forms endomycorrhizae (vesicular arbuscular mycorrhiza).

Teacher's Note:
1. In the five kingdom scheme, Monera holds all prokaryotes and Protista all unicellular eukaryotes.
2. For fungi, remember the three named classes by their sexual spores and the form-class Deuteromycetes by absence of a sexual stage.

Question 4: Generally plant viruses are :-
(a) Double stranded DNA viruses
(b) Single stranded RNA viruses
(c) Single stranded DNA viruses
(d) Double stranded RNA viruses
Show Answer & Explanation

Answer: (b) Single stranded RNA viruses

Explanation:
1. Most plant viruses contain single stranded RNA.

Teacher's Note:
1. Viruses, viroids, prions and lichens are outside the five kingdoms.
2. Link each scientist with the discovery: Ivanowsky TMV, Beijerinck contagium vivum fluidum, Stanley crystals, Diener viroid.

Question 5: Which of the following are not included in the five kingdom system of classification ? (a) Viruses (b) Viroid (c) Lichen (d) Prions
(a) only a and b
(b) only b, c and d
(c) only a and c
(d) All a, b, c and d
Show Answer & Explanation

Answer: (d) All a, b, c and d

Explanation:
1. Viruses, viroids, lichens and prions are all left out of the five kingdom system.

Teacher's Note:
1. Archaebacteria differ from eubacteria in cell wall chemistry and survive harsh habitats.
2. Protists are mainly aquatic and form a link with plants, animals and fungi.

Question 6: Select incorrect statement about lichens :-
(a) These are very good pollution indicators
(b) The algal component of lichen is known as phycobiont
(c) The fungal component of lichen is known as mycobiont
(d) The algal component of lichen is known as mycobiont
Show Answer & Explanation

Answer: (d) The algal component of lichen is known as mycobiont

Explanation:
1. The algal partner of a lichen is the phycobiont; the fungal partner is the mycobiont.

Teacher's Note:
1. In the five kingdom scheme, Monera holds all prokaryotes and Protista all unicellular eukaryotes.
2. For fungi, remember the three named classes by their sexual spores and the form-class Deuteromycetes by absence of a sexual stage.

Question 7: Select incorrect statement :-
(a) W.M. Stanly showed that viruses could be crystallized.
(b) In addition to protein coat viruses also contain genetic material that could be either RNA or DNA
(c) The small sub units of capsid called capsomeres
(d) The small subunits of capsid are called peplomers
Show Answer & Explanation

Answer: (d) The small subunits of capsid are called peplomers

Explanation:
1. The subunits of the capsid are capsomeres, not peplomers.

Teacher's Note:
1. Viruses, viroids, prions and lichens are outside the five kingdoms.
2. Link each scientist with the discovery: Ivanowsky TMV, Beijerinck contagium vivum fluidum, Stanley crystals, Diener viroid.

Question 8: Which among the following was not the criteria for classification of organisms into 5 kingdoms proposed by Whittaker ?
(a) Complexity of cell
(b) Phylogenetic relationship
(c) Mode of nutrition
(d) Metabolism
Show Answer & Explanation

Answer: (d) Metabolism

Explanation:
1. Whittaker used cell structure, body organisation, nutrition, reproduction and phylogeny; metabolism was not a criterion.

Teacher's Note:
1. Archaebacteria differ from eubacteria in cell wall chemistry and survive harsh habitats.
2. Protists are mainly aquatic and form a link with plants, animals and fungi.

Question 9: In five kingdom classification of Whittaker, all prokaryotic organism were grouped together under kingdom monera. Among the following statements findout incorrect for Bacteria :
(a) Bacteria are gouped under four groups based on their shape
(b) They are simple in structure, but complex in behaviour
(c) They show most extensive metabolic diversity
(d) The vast majority of bacteria are autotrophs
Show Answer & Explanation

Answer: (d) The vast majority of bacteria are autotrophs

Explanation:
1. Most bacteria are heterotrophs, so saying that most are autotrophs is incorrect.

Teacher's Note:
1. Viruses, viroids, prions and lichens are outside the five kingdoms.
2. Link each scientist with the discovery: Ivanowsky TMV, Beijerinck contagium vivum fluidum, Stanley crystals, Diener viroid.

Question 10: Which kingdom out of five kingdoms proposed by Whittaker, forms a link with others dealing with plants, animals and fungi ?
(a) Monera
(b) Protista
(c) Plantae
(d) Fungi
Show Answer & Explanation

Answer: (b) Protista

Explanation:
1. Protista forms a link with plants, animals and fungi.

Teacher's Note:
1. In the five kingdom scheme, Monera holds all prokaryotes and Protista all unicellular eukaryotes.
2. For fungi, remember the three named classes by their sexual spores and the form-class Deuteromycetes by absence of a sexual stage.

Question 11: Chrysophytes involves :
(a) diatoms
(b) dinoflagellates
(c) desmids
(d) both 1 and 3
Show Answer & Explanation

Answer: (d) both 1 and 3

Explanation:
1. Chrysophytes include diatoms and desmids.

Teacher's Note:
1. Viruses, viroids, prions and lichens are outside the five kingdoms.
2. Link each scientist with the discovery: Ivanowsky TMV, Beijerinck contagium vivum fluidum, Stanley crystals, Diener viroid.

Question 12: Released toxins of which group of protista is the cause of death of other marine animals such as fishes :-
(a) Chrysophytes
(b) Dianoflagellates
(c) Desmids
(d) Euglenoids
Show Answer & Explanation

Answer: (b) Dianoflagellates

Explanation:
1. Toxins released by dinoflagellates in red tides kill fishes and other marine animals.

Teacher's Note:
1. Archaebacteria differ from eubacteria in cell wall chemistry and survive harsh habitats.
2. Protists are mainly aquatic and form a link with plants, animals and fungi.

Question 13: In deprived of sunlight which group of protista behave like heterotrophs by predating on other smaller organisms :-
(a) Slime moulds
(b) Protozoans
(c) Euglenoids
(d) Dinoflagellates
Show Answer & Explanation

Answer: (c) Euglenoids

Explanation:
1. Euglenoids behave as heterotrophs by predation when sunlight is absent.

Teacher's Note:
1. In the five kingdom scheme, Monera holds all prokaryotes and Protista all unicellular eukaryotes.
2. For fungi, remember the three named classes by their sexual spores and the form-class Deuteromycetes by absence of a sexual stage.

Question 14: Which of the following group of organisms show a great diversity in morphology and habitat :-
(a) Chrysophytes
(b) Dinoflagellates
(c) Protozoan protists
(d) Fungi
Show Answer & Explanation

Answer: (d) Fungi

Explanation:
1. Fungi show great diversity in morphology and habitat.

Teacher's Note:
1. Archaebacteria differ from eubacteria in cell wall chemistry and survive harsh habitats.
2. Protists are mainly aquatic and form a link with plants, animals and fungi.

Question 15: On the basis of intervening dikaryotic stage which of the following fungal group is odd :
(a) Phycomycetes
(b) Basidiomycetes
(c) Ascomycetes
(d) Club fungi
Show Answer & Explanation

Answer: (a) Phycomycetes

Explanation:
1. Phycomycetes lack the dikaryotic stage; ascomycetes and basidiomycetes (club fungi) have it.

Teacher's Note:
1. In the five kingdom scheme, Monera holds all prokaryotes and Protista all unicellular eukaryotes.
2. For fungi, remember the three named classes by their sexual spores and the form-class Deuteromycetes by absence of a sexual stage.

Question 16: Kingdom fungi classify into various classes based on some parameters except :
(a) Morphology of mycelium
(b) Mode of spore formation
(c) Dikaryophase
(d) Fruiting body
Show Answer & Explanation

Answer: (c) Dikaryophase

Explanation:
1. Classes of fungi are based on mycelial morphology, mode of spore formation and fruiting bodies, not on a dikaryophase as such.

Teacher's Note:
1. Viruses, viroids, prions and lichens are outside the five kingdoms.
2. Link each scientist with the discovery: Ivanowsky TMV, Beijerinck contagium vivum fluidum, Stanley crystals, Diener viroid.

Question 17: Which of the following is not applicable on phycomycetes :
(a) Obligate parasites on plants
(b) Found in moist and damp places
(c) Septate, Coenocytic mycelium
(d) Endogenously produced spores
Show Answer & Explanation

Answer: (c) Septate, Coenocytic mycelium

Explanation:
1. Phycomycete mycelium is aseptate and coenocytic, so septate is not applicable.

Teacher's Note:
1. Archaebacteria differ from eubacteria in cell wall chemistry and survive harsh habitats.
2. Protists are mainly aquatic and form a link with plants, animals and fungi.

Question 18: In which class of fungi generally sex organs are absent but plasmogamy is brought about by fusion of two vegetative or somatic cells which have different strains or genotypes.
(a) Phycomycetes
(b) Ascomycetes
(c) Basidiomycetes
(d) Deuteromycetes
Show Answer & Explanation

Answer: (c) Basidiomycetes

Explanation:
1. In basidiomycetes sex organs are absent and plasmogamy occurs by fusion of somatic cells of different strains.

Teacher's Note:
1. In the five kingdom scheme, Monera holds all prokaryotes and Protista all unicellular eukaryotes.
2. For fungi, remember the three named classes by their sexual spores and the form-class Deuteromycetes by absence of a sexual stage.

Question 19: Majority of members of deuteromycetes are
(a) Autotrophs
(b) Parasites
(c) Decomposers
(d) Symbiotic
Show Answer & Explanation

Answer: (c) Decomposers

Explanation:
1. Most deuteromycetes are decomposers (many are also parasites).

Teacher's Note:
1. Archaebacteria differ from eubacteria in cell wall chemistry and survive harsh habitats.
2. Protists are mainly aquatic and form a link with plants, animals and fungi.

Question 20: About pathogenecity of viruses which among the following is not correct ?
(a) Plant infecting viruses having ssRNA
(b) Animal infecting viruses having single or double stranded RNA or double stranded DNA
(c) Bacteriophages usually have double stranded RNA
(d) Bacterophages usually have double stranded DNA
Show Answer & Explanation

Answer: (c) Bacteriophages usually have double stranded RNA

Explanation:
1. Bacteriophages have double stranded DNA, so the statement of RNA is wrong.

Teacher's Note:
1. Viruses, viroids, prions and lichens are outside the five kingdoms.
2. Link each scientist with the discovery: Ivanowsky TMV, Beijerinck contagium vivum fluidum, Stanley crystals, Diener viroid.

Free study material for Biology

Multiple Choice Questions (MCQs) for NEET Biology Biological Classification

NEET Biology Biological Classification Objective Test Questions

Test your conceptual understanding of Biological Classification with these targeted multiple-choice questions. Designed in alignment with the latest NEET curriculum for NEET Biology, these problem sets build accuracy and prepare students for objective exams.

NCERT-Aligned Objective Questions and Solutions

Each question includes structured solution keys mapped directly to standard NEET textbooks, helping students evaluate their reasoning and correct mistakes early in their revision.

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FAQs

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