Complete Biological Classification Question Bank & Solutions (70 Questions)
Q1 of 70
NEET NCERT Line-by-Line
The Five Kingdom classification was proposed by:
(A)
Linnaeus
(B)
Aristotle
(C)
R.H. Whittaker
(D)
Carl Woese
Show Answer & NCERT Explanation
Correct Answer: (C) R.H. Whittaker
R.H. Whittaker proposed it in 1969.
Q2 of 70
NEET NCERT Line-by-Line
Which is NOT one of Whittaker's five kingdoms?
(A)
Monera
(B)
Protista
(C)
Bacteria
(D)
Fungi
Show Answer & NCERT Explanation
Correct Answer: (C) Bacteria
Bacteria are members of Monera, not a separate kingdom.
Q3 of 70
NEET NCERT Line-by-Line
Which kingdom contains prokaryotes only?
(A)
Protista
(B)
Monera
(C)
Fungi
(D)
Plantae
Show Answer & NCERT Explanation
Correct Answer: (B) Monera
Monera is the only prokaryotic kingdom.
Q4 of 70
NEET NCERT Line-by-Line
Sole members of Kingdom Monera are:
(A)
Protozoa
(B)
Fungi
(C)
Bacteria
(D)
Algae
Show Answer & NCERT Explanation
Correct Answer: (C) Bacteria
Bacteria are the sole members of Monera.
Q5 of 70
NEET NCERT Line-by-Line
A comma-shaped bacterium is called a:
(A)
Coccus
(B)
Bacillus
(C)
Vibrium
(D)
Spirillum
Show Answer & NCERT Explanation
Correct Answer: (C) Vibrium
Vibrium (vibrio) is comma-shaped.
Q6 of 70
NEET NCERT Line-by-Line
Bacteria that live in extremely salty areas are:
(A)
Methanogens
(B)
Halophiles
(C)
Thermoacidophiles
(D)
Cyanobacteria
Show Answer & NCERT Explanation
Correct Answer: (B) Halophiles
Halophiles inhabit extreme salty habitats.
Q7 of 70
NEET NCERT Line-by-Line
Methanogens are found in the gut of ruminants and produce:
(A)
Oxygen
(B)
Methane (biogas)
(C)
Ammonia
(D)
Lactic acid
Show Answer & NCERT Explanation
Correct Answer: (B) Methane (biogas)
Methanogens produce methane (biogas) from dung.
Q8 of 70
NEET NCERT Line-by-Line
Cyanobacteria are also known as:
(A)
Golden algae
(B)
Blue-green algae
(C)
Slime moulds
(D)
Diatoms
Show Answer & NCERT Explanation
Correct Answer: (B) Blue-green algae
Cyanobacteria = blue-green algae (BGA).
Q9 of 70
NEET NCERT Line-by-Line
Nitrogen fixation in Nostoc and Anabaena occurs in:
(A)
Pellicle
(B)
Heterocysts
(C)
Gullet
(D)
Capsid
Show Answer & NCERT Explanation
Correct Answer: (B) Heterocysts
Heterocysts are specialised N₂-fixing cells.
Q10 of 70
NEET NCERT Line-by-Line
Which organisms completely lack a cell wall and are the smallest living cells?
(A)
Cyanobacteria
(B)
Mycoplasma
(C)
Diatoms
(D)
Yeast
Show Answer & NCERT Explanation
Correct Answer: (B) Mycoplasma
Mycoplasma lack a cell wall and are the smallest living cells.
Q11 of 70
NEET NCERT Line-by-Line
Diatoms belong to which group of Protista?
(A)
Dinoflagellates
(B)
Chrysophytes
(C)
Euglenoids
(D)
Slime moulds
Show Answer & NCERT Explanation
Correct Answer: (B) Chrysophytes
Diatoms and golden algae are Chrysophytes.
Q12 of 70
NEET NCERT Line-by-Line
The indestructible accumulated cell walls of diatoms form:
(A)
Pellicle
(B)
Diatomaceous earth
(C)
Capsid
(D)
Mycelium
Show Answer & NCERT Explanation
Correct Answer: (B) Diatomaceous earth
Silica walls accumulate as diatomaceous earth.
Q13 of 70
NEET NCERT Line-by-Line
Red tides are caused by:
(A)
Diatoms
(B)
Dinoflagellates
(C)
Euglenoids
(D)
Slime moulds
Show Answer & NCERT Explanation
Correct Answer: (B) Dinoflagellates
Rapid growth of red dinoflagellates (e.g., Gonyaulax) causes red tides.
Q14 of 70
NEET NCERT Line-by-Line
Instead of a cell wall, euglenoids have a:
(A)
Capsid
(B)
Pellicle
(C)
Gullet
(D)
Sheath
Show Answer & NCERT Explanation
Correct Answer: (B) Pellicle
Euglenoids have a protein-rich pellicle.
Q15 of 70
NEET NCERT Line-by-Line
Which protist behaves like a plant in light and an animal in the dark?
(A)
Amoeba
(B)
Euglena
(C)
Paramoecium
(D)
Plasmodium
Show Answer & NCERT Explanation
Correct Answer: (B) Euglena
Euglena is photosynthetic in light and heterotrophic in darkness.
Q16 of 70
NEET NCERT Line-by-Line
Slime moulds are best described as:
(A)
Autotrophic
(B)
Saprophytic
(C)
Parasitic
(D)
Chemosynthetic
Show Answer & NCERT Explanation
Correct Answer: (B) Saprophytic
Slime moulds are saprophytic protists.
Q17 of 70
NEET NCERT Line-by-Line
Which protozoan causes malaria?
(A)
Trypanosoma
(B)
Entamoeba
(C)
Plasmodium
(D)
Paramoecium
Show Answer & NCERT Explanation
Correct Answer: (C) Plasmodium
Plasmodium (a sporozoan) causes malaria.
Q18 of 70
NEET NCERT Line-by-Line
Trypanosoma causes:
(A)
Malaria
(B)
Sleeping sickness
(C)
Amoebic dysentery
(D)
Red tides
Show Answer & NCERT Explanation
Correct Answer: (B) Sleeping sickness
The flagellate Trypanosoma causes sleeping sickness.
Q19 of 70
NEET NCERT Line-by-Line
The cell wall of fungi is mainly made of:
(A)
Cellulose
(B)
Chitin
(C)
Peptidoglycan
(D)
Pectin
Show Answer & NCERT Explanation
Correct Answer: (B) Chitin
Fungal walls are chitin + polysaccharides.
Q20 of 70
NEET NCERT Line-by-Line
A continuous, multinucleate hypha without septa is called:
(A)
Septate
(B)
Coenocytic
(C)
Dikaryotic
(D)
Holozoic
Show Answer & NCERT Explanation
Correct Answer: (B) Coenocytic
Such hyphae are coenocytic.
Q21 of 70
NEET NCERT Line-by-Line
The correct order of the fungal sexual cycle is:
(A)
Karyogamy → Plasmogamy → Meiosis
(B)
Plasmogamy → Karyogamy → Meiosis
(C)
Meiosis → Plasmogamy → Karyogamy
(D)
Plasmogamy → Meiosis → Karyogamy
Show Answer & NCERT Explanation
Correct Answer: (B) Plasmogamy → Karyogamy → Meiosis
Plasmogamy → Karyogamy → Meiosis.
Q22 of 70
NEET NCERT Line-by-Line
Rhizopus, the bread mould, belongs to:
(A)
Ascomycetes
(B)
Basidiomycetes
(C)
Phycomycetes
(D)
Deuteromycetes
Show Answer & NCERT Explanation
Correct Answer: (C) Phycomycetes
Rhizopus is a phycomycete.
Q23 of 70
NEET NCERT Line-by-Line
Yeast (Saccharomyces) is classified under:
(A)
Phycomycetes
(B)
Ascomycetes
(C)
Basidiomycetes
(D)
Deuteromycetes
Show Answer & NCERT Explanation
Correct Answer: (B) Ascomycetes
Yeast is a unicellular ascomycete.
Q24 of 70
NEET NCERT Line-by-Line
Puccinia (rust fungus) belongs to:
(A)
Phycomycetes
(B)
Ascomycetes
(C)
Basidiomycetes
(D)
Deuteromycetes
Show Answer & NCERT Explanation
Correct Answer: (C) Basidiomycetes
Puccinia is a basidiomycete.
Q25 of 70
NEET NCERT Line-by-Line
'Imperfect fungi' refers to:
(A)
Phycomycetes
(B)
Ascomycetes
(C)
Deuteromycetes
(D)
Basidiomycetes
Show Answer & NCERT Explanation
Correct Answer: (C) Deuteromycetes
Deuteromycetes are imperfect — only asexual phase known.
Q26 of 70
NEET NCERT Line-by-Line
Asexual spores of ascomycetes are called:
(A)
Zoospores
(B)
Conidia
(C)
Basidiospores
(D)
Zygospores
Show Answer & NCERT Explanation
Correct Answer: (B) Conidia
Ascomycetes produce conidia (asexual) and ascospores (sexual).
Q27 of 70
NEET NCERT Line-by-Line
Mushrooms, bracket fungi and puffballs belong to:
(A)
Phycomycetes
(B)
Ascomycetes
(C)
Basidiomycetes
(D)
Deuteromycetes
Show Answer & NCERT Explanation
Correct Answer: (C) Basidiomycetes
These are basidiomycetes.
Q28 of 70
NEET NCERT Line-by-Line
Albugo, a parasite on mustard, is a:
(A)
Phycomycete
(B)
Ascomycete
(C)
Basidiomycete
(D)
Deuteromycete
Show Answer & NCERT Explanation
Correct Answer: (A) Phycomycete
Albugo is a phycomycete.
Q29 of 70
NEET NCERT Line-by-Line
Which fungus is widely used in genetics and biochemistry?
(A)
Agaricus
(B)
Neurospora
(C)
Ustilago
(D)
Rhizopus
Show Answer & NCERT Explanation
Correct Answer: (B) Neurospora
Neurospora (an ascomycete) is used in genetic work.
Q30 of 70
NEET NCERT Line-by-Line
Lichens are a symbiosis between:
(A)
Two fungi
(B)
Algae and fungi
(C)
Bacteria and algae
(D)
Two algae
Show Answer & NCERT Explanation
Correct Answer: (B) Algae and fungi
Lichens = algae (phycobiont) + fungi (mycobiont).
Q31 of 70
NEET NCERT Line-by-Line
In a lichen, the autotrophic partner is the:
(A)
Mycobiont
(B)
Phycobiont
(C)
Sporophyte
(D)
Gametophyte
Show Answer & NCERT Explanation
Correct Answer: (B) Phycobiont
The phycobiont (alga) is autotrophic and makes food.
Q32 of 70
NEET NCERT Line-by-Line
Lichens are good indicators of:
(A)
Soil fertility
(B)
Air pollution
(C)
Water hardness
(D)
Temperature
Show Answer & NCERT Explanation
Correct Answer: (B) Air pollution
Lichens do not grow in polluted areas, indicating pollution.
Q33 of 70
NEET NCERT Line-by-Line
Viruses contain:
(A)
Both DNA and RNA
(B)
Either DNA or RNA, never both
(C)
Only DNA
(D)
Only proteins
Show Answer & NCERT Explanation
Correct Answer: (B) Either DNA or RNA, never both
A virus has RNA or DNA, never both.
Q34 of 70
NEET NCERT Line-by-Line
The protein coat of a virus is the:
(A)
Pellicle
(B)
Capsid
(C)
Sheath
(D)
Cuticle
Show Answer & NCERT Explanation
Correct Answer: (B) Capsid
The capsid (of capsomeres) is the protein coat.
Q35 of 70
NEET NCERT Line-by-Line
Bacteriophages usually contain:
(A)
ssRNA
(B)
dsRNA
(C)
dsDNA
(D)
No genetic material
Show Answer & NCERT Explanation
Correct Answer: (C) dsDNA
Bacteriophages are usually double-stranded DNA viruses.
Q36 of 70
NEET NCERT Line-by-Line
The term 'Contagium vivum fluidum' was coined by:
(A)
Ivanowsky
(B)
Beijerinck
(C)
Stanley
(D)
Diener
Show Answer & NCERT Explanation
Correct Answer: (B) Beijerinck
Beijerinck (1898) called the infectious sap Contagium vivum fluidum.
Q37 of 70
NEET NCERT Line-by-Line
W.M. Stanley (1935) demonstrated that viruses:
(A)
Are bacteria
(B)
Can be crystallised and are largely protein
(C)
Contain both DNA and RNA
(D)
Have a cell wall
Show Answer & NCERT Explanation
Correct Answer: (B) Can be crystallised and are largely protein
Stanley crystallised viruses, showing crystals are largely protein.
Q38 of 70
NEET NCERT Line-by-Line
Viroids were discovered by:
(A)
Pasteur
(B)
T.O. Diener
(C)
Whittaker
(D)
Ivanowsky
Show Answer & NCERT Explanation
Correct Answer: (B) T.O. Diener
T.O. Diener discovered viroids in 1971.
Q39 of 70
NEET NCERT Line-by-Line
Viroids differ from viruses in that they:
(A)
Have a thicker capsid
(B)
Lack a protein coat (free RNA)
(C)
Contain DNA
(D)
Are larger
Show Answer & NCERT Explanation
Correct Answer: (B) Lack a protein coat (free RNA)
Viroids are free RNA without a protein coat.
Q40 of 70
NEET NCERT Line-by-Line
Potato spindle tuber disease is caused by a:
(A)
Virus
(B)
Viroid
(C)
Prion
(D)
Bacterium
Show Answer & NCERT Explanation
Correct Answer: (B) Viroid
It is caused by a viroid.
Q41 of 70
NEET NCERT Line-by-Line
Prions are infectious agents made of:
(A)
RNA
(B)
DNA
(C)
Abnormal protein
(D)
Lipid
Show Answer & NCERT Explanation
Correct Answer: (C) Abnormal protein
Prions are abnormally folded proteins.
Q42 of 70
NEET NCERT Line-by-Line
Which kingdom shows alternation of generations?
(A)
Monera
(B)
Protista
(C)
Plantae
(D)
Animalia
Show Answer & NCERT Explanation
Correct Answer: (C) Plantae
Plants alternate sporophyte and gametophyte generations.
Q43 of 70
NEET NCERT Line-by-Line
Venus flytrap and Bladderwort are examples of:
(A)
Parasitic plants
(B)
Insectivorous plants
(C)
Saprophytes
(D)
Lichens
Show Answer & NCERT Explanation
Correct Answer: (B) Insectivorous plants
They are insectivorous (partially heterotrophic) plants.
Q44 of 70
NEET NCERT Line-by-Line
Cuscuta is a:
(A)
Insectivorous plant
(B)
Parasitic plant
(C)
Fungus
(D)
Alga
Show Answer & NCERT Explanation
Correct Answer: (B) Parasitic plant
Cuscuta is a parasitic plant.
Q45 of 70
NEET NCERT Line-by-Line
Mode of nutrition in Kingdom Animalia is:
(A)
Autotrophic
(B)
Chemosynthetic
(C)
Holozoic
(D)
Saprophytic only
Show Answer & NCERT Explanation
Correct Answer: (C) Holozoic
Animals are holozoic — they ingest food.
Q46 of 70
NEET NCERT Line-by-Line
Which kingdom has cellulose cell walls?
(A)
Monera
(B)
Fungi
(C)
Plantae
(D)
Animalia
Show Answer & NCERT Explanation
Correct Answer: (C) Plantae
Plant cell walls are mainly cellulose.
Q47 of 70
NEET NCERT Line-by-Line
Entamoeba is an example of a:
(A)
Ciliated protozoan
(B)
Amoeboid protozoan
(C)
Sporozoan
(D)
Flagellate
Show Answer & NCERT Explanation
Correct Answer: (B) Amoeboid protozoan
Entamoeba is a parasitic amoeboid protozoan.
Q48 of 70
NEET NCERT Line-by-Line
Paramoecium moves and feeds using:
(A)
Pseudopodia
(B)
Flagella
(C)
Cilia and a gullet
(D)
Pellicle
Show Answer & NCERT Explanation
Correct Answer: (C) Cilia and a gullet
Ciliated Paramoecium uses cilia and a gullet.
Q49 of 70
NEET NCERT Line-by-Line
Bacteria reproduce mainly by:
(A)
Budding
(B)
Fission
(C)
Conidia
(D)
Basidiospores
Show Answer & NCERT Explanation
Correct Answer: (B) Fission
Bacteria mainly reproduce by binary fission.
Q50 of 70
NEET NCERT Line-by-Line
The dikaryotic (n+n) phase is characteristic of:
(A)
Phycomycetes & Deuteromycetes
(B)
Ascomycetes & Basidiomycetes
(C)
Monera & Protista
(D)
Plantae & Animalia
Show Answer & NCERT Explanation
Correct Answer: (B) Ascomycetes & Basidiomycetes
The dikaryophase occurs in ascomycetes and basidiomycetes.
Q51 of 70
NEET NCERT Line-by-Line
Which combination of features is unique to Kingdom Monera?
(A)
Eukaryotic + cellulose wall
(B)
Prokaryotic + no nuclear membrane
(C)
Eukaryotic + no wall
(D)
Prokaryotic + cellulose wall
Show Answer & NCERT Explanation
Correct Answer: (B) Prokaryotic + no nuclear membrane
Only Monera is prokaryotic with no nuclear membrane.
Q52 of 70
NEET NCERT Line-by-Line
Chlamydomonas and Spirogyra were wrongly grouped together in old systems because both:
(A)
Fix nitrogen
(B)
Had a cell wall
(C)
Were prokaryotic
(D)
Were heterotrophic
Show Answer & NCERT Explanation
Correct Answer: (B) Had a cell wall
Old 'Plants' united everything with a cell wall, ignoring uni/multicellular and pro/eukaryote differences.
Q53 of 70
NEET NCERT Line-by-Line
Which statement about diatoms is FALSE?
(A)
Their walls contain silica
(B)
They are chief ocean producers
(C)
Their walls are easily destroyed
(D)
Walls overlap like a soap-box
Show Answer & NCERT Explanation
Correct Answer: (C) Their walls are easily destroyed
Diatom walls are indestructible (silica), not easily destroyed.
Q54 of 70
NEET NCERT Line-by-Line
A photosynthetic protist with two flagella and stiff cellulose plates that can cause red tides is a:
(A)
Diatom
(B)
Dinoflagellate
(C)
Euglenoid
(D)
Slime mould
Show Answer & NCERT Explanation
Correct Answer: (B) Dinoflagellate
These describe dinoflagellates (e.g., Gonyaulax).
Q55 of 70
NEET NCERT Line-by-Line
Which is the odd one out by mode of nutrition?
(A)
Slime mould
(B)
Amoeba
(C)
Euglena in darkness
(D)
Cyanobacteria
Show Answer & NCERT Explanation
Correct Answer: (D) Cyanobacteria
Cyanobacteria are autotrophic; the others are (or become) heterotrophic.
Q56 of 70
NEET NCERT Line-by-Line
A fungus reproduces only by conidia and its sexual stage is unknown. It is a:
(A)
Phycomycete
(B)
Ascomycete
(C)
Basidiomycete
(D)
Deuteromycete
Show Answer & NCERT Explanation
Correct Answer: (D) Deuteromycete
Lacking a known sexual stage = Deuteromycete (imperfect fungi).
Q57 of 70
NEET NCERT Line-by-Line
Which set is correctly matched (fungus → class)?
(A)
Mucor → Basidiomycetes
(B)
Agaricus → Ascomycetes
(C)
Puccinia → Basidiomycetes
(D)
Yeast → Phycomycetes
Show Answer & NCERT Explanation
Correct Answer: (C) Puccinia → Basidiomycetes
Puccinia (rust) is a basidiomycete.
Q58 of 70
NEET NCERT Line-by-Line
The dikaryophase is absent in:
(A)
Ascomycetes
(B)
Basidiomycetes
(C)
Phycomycetes
(D)
Both ascomycetes and basidiomycetes
Show Answer & NCERT Explanation
Correct Answer: (C) Phycomycetes
Phycomycetes lack the dikaryotic stage (it occurs in asco- and basidiomycetes).
Q59 of 70
NEET NCERT Line-by-Line
Which feature does NOT belong to viruses?
(A)
Contain a capsid
(B)
Obligate parasites
(C)
Contain both DNA and RNA
(D)
Inert outside host
Show Answer & NCERT Explanation
Correct Answer: (C) Contain both DNA and RNA
A virus has either DNA or RNA, never both.
Q60 of 70
NEET NCERT Line-by-Line
Match the scientist to the contribution — which is wrong?
(A)
Ivanowsky → tobacco mosaic
(B)
Beijerinck → Contagium vivum fluidum
(C)
Stanley → crystallised virus
(D)
Diener → named 'virus'
Show Answer & NCERT Explanation
Correct Answer: (D) Diener → named 'virus'
'Virus' was named by Pasteur; Diener discovered viroids.
Q61 of 70
NEET NCERT Line-by-Line
Lichens dying off in a city centre most directly indicate:
(A)
High soil fertility
(B)
Air pollution
(C)
Abundant rainfall
(D)
Low temperature
Show Answer & NCERT Explanation
Correct Answer: (B) Air pollution
Lichens are sensitive pollution indicators.
Q62 of 70
NEET NCERT Line-by-Line
Which pair shares the SAME mode of nutrition?
(A)
Fungi & Plantae
(B)
Monera (some) & Plantae — autotrophy
(C)
Animalia & Plantae
(D)
Fungi & Cyanobacteria
Show Answer & NCERT Explanation
Correct Answer: (B) Monera (some) & Plantae — autotrophy
Some Monera (photosynthetic/chemosynthetic) and Plantae are autotrophic; fungi/animals are heterotrophic.
Q63 of 70
NEET NCERT Line-by-Line
A free, low-molecular-weight RNA without protein causing potato spindle tuber disease is a:
(A)
Virus
(B)
Viroid
(C)
Prion
(D)
Bacteriophage
Show Answer & NCERT Explanation
Correct Answer: (B) Viroid
That is a viroid (Diener, 1971).
Q64 of 70
NEET NCERT Line-by-Line
Which is true of archaebacteria?
(A)
They have a typical eubacterial wall
(B)
Their distinct wall lets them survive extremes
(C)
They are eukaryotic
(D)
They cannot live in salt
Show Answer & NCERT Explanation
Correct Answer: (B) Their distinct wall lets them survive extremes
A different cell-wall structure allows survival in extreme habitats.
Q65 of 70
NEET NCERT Line-by-Line
Identify the correct nutrition statement.
(A)
All bacteria are autotrophic
(B)
Most bacteria are heterotrophic
(C)
Bacteria cannot be chemosynthetic
(D)
Cyanobacteria are heterotrophic
Show Answer & NCERT Explanation
Correct Answer: (B) Most bacteria are heterotrophic
The vast majority of bacteria are heterotrophic.
Q66 of 70
NEET NCERT Line-by-Line
Which kingdom forms a 'link' between plants, animals and fungi?
(A)
Monera
(B)
Protista
(C)
Fungi
(D)
Animalia
Show Answer & NCERT Explanation
Correct Answer: (B) Protista
Protista links the other eukaryotic kingdoms.
Q67 of 70
NEET NCERT Line-by-Line
Three-domain system mainly modifies the five-kingdom scheme by:
(A)
Merging Plantae and Animalia
(B)
Splitting Monera into two domains
(C)
Removing Fungi
(D)
Adding viruses as a kingdom
Show Answer & NCERT Explanation
Correct Answer: (B) Splitting Monera into two domains
It divides Monera into two domains (e.g., Archaea and Bacteria).
Q68 of 70
NEET NCERT Line-by-Line
Which statement about mycoplasma is correct?
(A)
They have a thick cellulose wall
(B)
They are the largest cells
(C)
They lack a cell wall and survive without O₂
(D)
They are eukaryotic
Show Answer & NCERT Explanation
Correct Answer: (C) They lack a cell wall and survive without O₂
Mycoplasma lack a wall, are the smallest cells, and can survive without oxygen.
Q69 of 70
NEET NCERT Line-by-Line
In ascomycetes, ascospores are produced:
(A)
Exogenously on conidiophores
(B)
Endogenously inside asci
(C)
On basidia
(D)
In sporangia
Show Answer & NCERT Explanation
Correct Answer: (B) Endogenously inside asci
Ascospores form endogenously inside sac-like asci.
Q70 of 70
NEET NCERT Line-by-Line
Which group is the chief producer in oceans and stores walls as 'diatomaceous earth'?
(A)
Dinoflagellates
(B)
Chrysophytes (diatoms)
(C)
Euglenoids
(D)
Slime moulds
Show Answer & NCERT Explanation
Correct Answer: (B) Chrysophytes (diatoms)
Diatoms (Chrysophytes) are chief producers; their silica walls form diatomaceous earth.