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Biological Classification

123 Questions Start NEET Test
All Exams NEET AIIMS
2014 Q51 NEET MCQ
10 Mar 2026
Five kingdom system of classification suggested by R.H. Whittaker is not based on
A.
presence or absence of a well defined nucleus
B.
mode of reproduction
C.
mode of nutrition
D.
complexity of body organisation.
2014 Q52 NEET MCQ
10 Mar 2026
Which of the following shows coiled RNA strand and capsomeres?
A.
Polio virus
B.
Tobaco mosaic virus
C.
Measles virus
D.
Retrovirus
2014 Q53 NEET MCQ
10 Mar 2026
Anoxygenic photosynthesis is characteristic of
A.
Rhodospirillum
B.
Spirogyra
C.
Chlamydomonas
D.
Ulva.
2014 Q54 NEET MCQ
10 Mar 2026
Archaebacteria differ from eubacteria in
A.
cell membrane structure
B.
mode of nutrition
C.
cell shape
D.
mode of reproduction.
2014 Q55 NEET MCQ
10 Mar 2026
The motile bacteria are able to move by
A.
fimbriae
B.
flagella
C.
cilia
D.
pili.
2013 Q56 NEET MCQ
10 Mar 2026
Which one of the following is true for fungi?
A.
They lack a rigid cell wall.
B.
They are heterotrophs.
C.
They lack nuclear membrane.
D.
They are phagotrophs.
2013 Q57 NEET MCQ
10 Mar 2026
Why is a capsule advantageous to a bacterium?
A.
It protects the bacterium from desiccation.
B.
It provides means of locomotion
C.
It allows bacterium to ''hide'' from host's immune system.
D.
It allows the bacterium to attach to the surface.
2013 Q58 NEET MCQ
10 Mar 2026
Which of the following are likely to be present in deep sea water?
A.
Blue-green algae
B.
Saprophytic fungi
C.
Archaebacteria
D.
Eubacteria
2013 Q59 NEET MCQ
10 Mar 2026
Pigment containing membranous extensions in some cyanobacteria are
A.
pneumatophores
B.
chromatophores
C.
heterocysts
D.
basal bodies.
2012 Q60 NEET MCQ
10 Mar 2026
In the five kingdom classification, Chlamydomonas and Chlorella have been included in
A.
protista
B.
algae
C.
plantae
D.
monera.
2012 Q61 NEET MCQ
10 Mar 2026
Nuclear membrane is absent in
A.
Penicillium
B.
Agaricus
C.
Volvox
D.
Nostoc.
2012 Q62 NEET MCQ
10 Mar 2026
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?
A.
Azotobacter
B.
Aspergillus
C.
Glomus
D.
Trichoderma
2012 Q63 NEET MCQ
10 Mar 2026
The most abundant prokaryotes helpful to humans in making curd ftom milk and in production of antibiotics are the ones categorised as
A.
cyanobacteria
B.
archaebacteria
C.
chemosynthetic autotrophs
D.
heterotrophic bacteria.
2012 Q64 NEET MCQ
10 Mar 2026
Maximum nutritional diversity is found in the group
A.
fungi
B.
animalia
C.
monera
D.
plantae.
2012 Q65 NEET MCQ
10 Mar 2026
Which statement is wrong for viruses?
A.
All are parasites.
B.
All of them have helical symmetry
C.
They have ability to synthesize nucleic acids and proteins.
D.
Antibiotics have no effect on them.
2012 Q66 NEET MCQ
10 Mar 2026
Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?
A.
Paramecium and Plasmodium belong to the same kingdom as that of Penicillium.
B.
Lichen is a composite organisms formed from the symbiotic association of an algae and a protozoan.
C.
Yeast used in making bread and beer is a fungus.
D.
Nostoc and Anabaena are examples of protista.
2012 Q67 NEET MCQ
10 Mar 2026
The cyanobacteria are also referred to as
A.
protists
B.
golden algae
C.
slime moulds
D.
blue green algae.
2011 Q68 NEET MCQ
10 Mar 2026
The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of
A.
Taenia, a tapeworm
B.
Wuchereria, a filarial worm
C.
Rhizopus, a mould
D.
Ascaris, a round worm.
2011 Q69 NEET MCQ
10 Mar 2026
In eubacteria, a cellular component that resembles eukaryotic cell is
A.
plasma membrane
B.
nucleus
C.
ribosomes
D.
cell wall.
2011 Q70 NEET MCQ
10 Mar 2026
Which one of the following also acts as a catalyst in a bacterial cell?
A.
5S rRNA
B.
snRNA
C.
hnRNA
D.
23S rRNA
2011 Q71 NEET MCQ
10 Mar 2026
Which one of the following is incorrectly matched?
A.
Root pressure-guttation
B.
Puccinia-smut
C.
Root-exarch protoxylem
D.
Cassia-imbricate aestivation
2011 Q72 NEET MCQ
10 Mar 2026
Which one of the following organisms is not an eukaryotic cells?
A.
Paramecium caudatum
B.
Escherichia coli
C.
Euglena viridis
D.
Amoeba proteus
2010 Q73 NEET MCQ
10 Mar 2026
Given below is the diagram of a bacteriophage. In which one of the options all the four parts A, B, C and D are correct? AIPMT 2010 Mains Biology - Biological Classification Question 27 English
A.
A $ \to $ Collar, B $ \to $ Tail fibres, C $ \to $ Head, D $ \to $ Sheath
B.
A $ \to $ Tail fibres, B $ \to $ Head, C $ \to $ Sheath, D $ \to $ Collar
C.
A $ \to $ Head , B $ \to $ Sheath, C $ \to $ Collar, D $ \to $ Tail fibres
D.
A $ \to $ Sheath, B $ \to $ Collar, C $ \to $ Head, D $ \to $ Tail fibres
2010 Q74 NEET MCQ
10 Mar 2026
Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms.
(i)  Methanogens are archaebacteria which 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.
The correct statements are
A.
(ii) and (iii)
B.
(i), (ii) and (iii)
C.
(ii), (iii) and (iv)
D.
(i), (ii) and (iv).
2010 Q75 NEET MCQ
10 Mar 2026
Black (stem) rust of wheat is caused by
A.
Alternaria solani
B.
Ustilago nuda
C.
Puccinia graminis
D.
Xanthomonas oryzae.
2010 Q76 NEET MCQ
10 Mar 2026
Virus envelope is known as
A.
capsid
B.
virion
C.
nucleoprotein
D.
core.
2010 Q77 NEET MCQ
10 Mar 2026
Single-celled eukaryotes are included in
A.
protista
B.
fungi
C.
archaea
D.
monera.
2010 Q78 NEET MCQ
10 Mar 2026
Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups
A.
eubacteria and archaea
B.
cyanobacteria and diatoms
C.
protists and mosses
D.
liverworts and yeasts.
2010 Q79 NEET MCQ
10 Mar 2026
Membrane-bound organelles are absent in
A.
Saccharomyces
B.
Streptococcus
C.
Chlamydomonas
D.
Plasmodium.
2010 Q80 NEET MCQ
10 Mar 2026
One of the free-living, anaerobic nitrogen-fixer is
A.
Beijernickia
B.
Rhodospirillum
C.
Rhizobium
D.
Azotobacter.
2009 Q81 NEET MCQ
10 Mar 2026
Oxygenic photosynthesis occurs in
A.
Oscillatoria
B.
Rhodospirillium
C.
Chlorobium
D.
Chromatium
2009 Q82 NEET MCQ
10 Mar 2026
Phylogenetic system of classification is based on
A.
morphological features
B.
chemical constituents
C.
floral characters
D.
evolutionary relationships.
2009 Q83 NEET MCQ
10 Mar 2026
T.O. Diener discovered a
A.
free infectious DNA
B.
infectious protein
C.
bacteriophage
D.
free infectious RNA.
2009 Q84 NEET MCQ
10 Mar 2026
Which of the following is a symbiotic nitrogen fixer?
A.
Azotobacter
B.
Frankia
C.
Azolla
D.
Glomus
2009 Q85 NEET MCQ
10 Mar 2026
Which one is the wrong pairing for the disease and its causal organism?
A.
Black rust of wheat-Puccinia graminis
B.
Loose smut of wheat-Ustilago nuda
C.
Root knot of vegetables-Meloidogyne sp.
D.
Late blight of potato- Alternaria solani
2008 Q86 NEET MCQ
10 Mar 2026
Bacterial leaf blight of rice is caused by a species
A.
Alternaria
B.
Erwinia
C.
Xanthomonas
D.
Pseudomonas.
2008 Q87 NEET MCQ
10 Mar 2026
In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements in true about archaea?
A.
Archaea completely differ from both prokaryyotes and eukaryotes.
B.
Archaea completely differ from prokaryotes.
C.
Archaea resemble eukarya in all respects.
D.
Archaea have some novel features that are absent in other prokaryotes and eukaryotes.
2008 Q88 NEET MCQ
10 Mar 2026
Thermococcus, Methanococcus and Methanobacterium exemplify
A.
backteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
B.
bacteria that contain a cytoskeleton and ribosomes
C.
archaebacteria that contain protein homologous to eukaryotic core histones
D.
archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled.
2007 Q89 NEET MCQ
10 Mar 2026
Which one of the following statements about mycoplasma is wrong?
A.
They are pleomorphic?
B.
They are sensitive to penicillin.
C.
They cause diseases in plants.
D.
They are also called PPLO.
2007 Q90 NEET MCQ
10 Mar 2026
Which one of the following is a slime mould?
A.
Physarum
B.
Thiobacillus
C.
Anabaena
D.
Rhizopus
2007 Q91 NEET MCQ
10 Mar 2026
Which pair of the following belongs to basidiomycetes?
A.
Puffballs and Claviceps
B.
Peziza and stink horns
C.
Morchella and mushrooms
D.
Birds nest fungi and puffballs
2006 Q92 NEET MCQ
10 Mar 2026
Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread?
A.   Temperature of about 25o C
B.   Temperature of about 5o C
C.   Relative humidity of about 5%
D.   Relative humidity of about 95%
E.   A shady place
F.   A brightly illuminated place
Choose the answer from the following options.
A.
B, C and F only
B.
A, C and E only
C.
A, D and E only
D.
B, D and E only
2006 Q93 NEET MCQ
10 Mar 2026
Curing of tea leaves is brought about by the activity of
A.
fungi
B.
bacteria
C.
mycorrhiza
D.
viruses.
2005 Q94 NEET MCQ
10 Mar 2026
There exists a close association between the alga and the fungus within a lichen. The fungus
A.
provides protection, anchorage and absorption for the algae
B.
provides food for the alga
C.
fixes the atmospheric nitrogen for the alga
D.
releases oxygen for the alga
2005 Q95 NEET MCQ
10 Mar 2026
All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia
A.
can induce root nodules on many plant species
B.
can fix nitrogen in the free-living state
C.
cannot fix specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
D.
like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex.
2005 Q96 NEET MCQ
10 Mar 2026
For retting of jute the fermenting microbe used is
A.
methanophilic bacteria
B.
butyric acid bacteria
C.
Helicobactor pylori
D.
Streptococcus lactin.
2005 Q97 NEET MCQ
10 Mar 2026
Basophilic prokaryotes
A.
grow and multiply in very deep marine sediments
B.
occur in water containing high concentrations of barium hydroxide
C.
readily grow and divide in sea water enriched in any soluble salt of barium
D.
grow slowly in highly alkaline frozen lakes at high altitudes.
2004 Q98 NEET MCQ
10 Mar 2026
Lichens are well known combination of an alga and a fungus where fungus has
A.
a saprophytic relationship with the alga
B.
an epiphytic relationship with the alga
C.
a parasitic relationship with alga
D.
a symbiotic relationship with alga.
2004 Q99 NEET MCQ
10 Mar 2026
Phenetic classification of organisms is based on
A.
observable characteristics of existing organisms
B.
the ancestral lineage of existing organisms
C.
dendrogram based on DNA characteristics.
D.
sexual characteristics.
2004 Q100 NEET MCQ
10 Mar 2026
A free living nitrogen-fixing cyanobacterium which can also symbiotic association with the water ferm Azolla is
A.
Tolypothrix
B.
Chlorella
C.
Nostoc
D.
Anabaena.