NEET Biological Classification 100 MCQS QUIZ – 10 Tests AUGUST 15

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Biological Classification – 10 MCQ Tests

10 separate tests × 10 questions • Submit each test independently • Correct answers appear after submission

Test 1 – Classification Basics

10 Questions

1. Why was the two-kingdom classification considered inadequate?

It did not distinguish prokaryotes and eukaryotes It included too many kingdoms It used DNA sequencing It classified only fungi

Correct answer: It did not distinguish prokaryotes and eukaryotes

2. The five-kingdom classification was proposed by:

C. Linnaeus R.H. Whittaker Robert Hooke Virchow

Correct answer: R.H. Whittaker

3. Single-celled eukaryotes are included in:

Monera Protista Fungi Archaea

Correct answer: Protista

4. In Whittaker's five-kingdom system, eukaryotes are distributed among how many kingdoms?

Two Three Four Five

Correct answer: Four

5. Which kingdom has no well-defined boundaries?

Monera Protista Fungi Animalia

Correct answer: Protista

6. Which group includes blue-green algae/cyanobacteria in the Whittaker system?

Fungi Protista Monera Plantae

Correct answer: Monera

7. Which organism is prokaryotic?

Paramecium caudatum Euglena viridis Escherichia coli Amoeba proteus

Correct answer: Escherichia coli

8. Membrane-bound organelles are absent in:

Plasmodium Saccharomyces Streptococcus Chlamydomonas

Correct answer: Streptococcus

9. Mycoplasmas are classified under:

Monera Protista Fungi Plantae

Correct answer: Monera

10. Which is a defining feature of the five-kingdom system?

Only habitat Complexity of cell structure and nutrition Only body size Only colour

Correct answer: Complexity of cell structure and nutrition

Test 2 – Monera & Bacteria

10 Questions

1. Structures that help some bacteria attach to rocks or host tissues are:

Fimbriae Mesosomes Rhizoids Chloroplasts

Correct answer: Fimbriae

2. Motile bacteria generally move by:

Cilia Flagella Pili Fimbriae

Correct answer: Flagella

3. Photosynthetic bacteria contain pigments in:

Chloroplasts Leucoplasts Chromatophores Chromoplasts

Correct answer: Chromatophores

4. Bacterial leaf blight of rice is caused by:

Xanthomonas Alternaria Erwinia Pseudomonas

Correct answer: Xanthomonas

5. Biogas production in the dung of ruminants is associated with:

Eubacteria Methanogens Cyanobacteria Halophiles

Correct answer: Methanogens

6. Chemosynthetic autotrophs obtain energy mainly from:

Oxidation of inorganic substances Sunlight only Animal tissues Fermentation of starch

Correct answer: Oxidation of inorganic substances

7. The sticky character of a bacterial cell is provided by:

Nuclear membrane Glycocalyx Ribosome Cellulose

Correct answer: Glycocalyx

8. Which bacterial structure contains the main naked circular DNA?

Nucleoid Chloroplast Golgi body Vacuole

Correct answer: Nucleoid

9. Bacterial ribosomes are generally:

80S 70S 60S 90S

Correct answer: 70S

10. Bacterial genetic material can be transferred by bacteriophage through:

Transduction Photosynthesis Budding Sporulation

Correct answer: Transduction

Test 3 – Archaebacteria & Special Bacteria

10 Questions

1. Organisms living in salty areas are called:

Methanogens Halophiles Thermoacidophiles Heliophytes

Correct answer: Halophiles

2. Methanogens are especially associated with:

Cattle dung and marshy areas Dry deserts only Flower petals Ocean surface algae

Correct answer: Cattle dung and marshy areas

3. Archaebacteria differ from eubacteria notably in their:

Cell wall and membrane structure Presence of chloroplasts Multicellularity Ability to form flowers

Correct answer: Cell wall and membrane structure

4. Archaebacterial cell walls are characterized by the absence of:

Protein Peptidoglycan Polysaccharides Lipids

Correct answer: Peptidoglycan

5. Archaebacteria can survive harsh habitats partly because of their:

Distinct cell wall structure Chloroplasts Cellulose wall Cilia

Correct answer: Distinct cell wall structure

6. Organisms that grow at very high temperatures such as 100–105°C are associated with:

Archaebacteria Bryophytes Angiosperms Protozoa

Correct answer: Archaebacteria

7. The plasma membrane of archaebacteria is characterized by:

Branched-chain lipids Cellulose fibres Chitin Only saturated proteins

Correct answer: Branched-chain lipids

8. Which archaebacterial group produces methane?

Halophiles Methanogens Thermoacidophiles Cyanobacteria

Correct answer: Methanogens

9. Mycoplasma lacks:

Cell wall Ribosomes DNA Plasma membrane

Correct answer: Cell wall

10. Mycoplasma is also called:

PPLO TMV BGA HIV

Correct answer: PPLO

Test 4 – Protists & Protozoans

10 Questions

1. Ciliates such as Paramecium differ from other protozoans by having:

Two types of nuclei No nucleus Chloroplasts A cell wall

Correct answer: Two types of nuclei

2. Genetic information in Paramecium is mainly contained in the:

Micronucleus Macronucleus Contractile vacuole Pellicle

Correct answer: Micronucleus

3. Excretion and osmoregulation in Amoeba are associated with the:

Contractile vacuole Pseudopodium Nucleus Pellicle

Correct answer: Contractile vacuole

4. Trypanosoma belongs to the group of:

Zooflagellates/flagellated protozoans Ciliates Sporozoans Amoeboids

Correct answer: Zooflagellates/flagellated protozoans

5. African sleeping sickness is caused by:

Trypanosoma gambiense Plasmodium vivax Entamoeba coli Paramecium

Correct answer: Trypanosoma gambiense

6. The infective stage of Plasmodium entering humans is the:

Merozoite Sporozoite Trophozoite Minuta form

Correct answer: Sporozoite

7. Malignant tertian malaria is caused by:

Plasmodium falciparum P. vivax P. ovale P. malariae

Correct answer: Plasmodium falciparum

8. Which is a ciliated protozoan?

Plasmodium vivax Amoeba proteus Paramecium caudatum Leishmania donovani

Correct answer: Paramecium caudatum

9. The organisms Trypanosoma, Noctiluca, Monocystis and Giardia have in common that they are:

Unicellular protists Multicellular fungi Bacteria Plants

Correct answer: Unicellular protists

10. Kala-azar is caused by:

Leishmania donovani Trypanosoma gambiense Plasmodium falciparum Entamoeba coli

Correct answer: Leishmania donovani

Test 5 – Euglenoids, Diatoms & Lichens

10 Questions

1. Euglenoids have a flexible protein-rich covering called:

Pellicle Chitin Peptidoglycan Frustule

Correct answer: Pellicle

2. Euglena shows mixotrophic nutrition because it:

Photosynthesizes in light and can feed heterotrophically without light Always eats bacteria Always photosynthesizes Lacks chlorophyll

Correct answer: Photosynthesizes in light and can feed heterotrophically without light

3. Euglena is considered a connecting link between:

Plants and animals Fungi and bacteria Animals and fungi Monera and Plantae

Correct answer: Plants and animals

4. The pigments of Euglena are similar to those of:

Green plants Fungi Animals Archaebacteria

Correct answer: Green plants

5. Diatom cell walls are mainly embedded with:

Silica Chitin Peptidoglycan Cellulose only

Correct answer: Silica

6. The thick deposits formed by accumulated diatom shells are called:

Diatomaceous earth Red tides Pseudorocks Red sea

Correct answer: Diatomaceous earth

7. Lichens are a symbiotic association between:

Algae and fungi Algae and protozoa Bacteria and animals Fungi and animals

Correct answer: Algae and fungi

8. In a lichen, the fungus mainly provides:

Protection, anchorage and absorption Food by photosynthesis Oxygen Only nitrogen fixation

Correct answer: Protection, anchorage and absorption

9. Lichens are useful as indicators of:

Air pollution Soil salinity only Water hardness Temperature

Correct answer: Air pollution

10. The phycobiont of a lichen is mostly a:

Green alga or cyanobacterium Fungus Protozoan Moss

Correct answer: Green alga or cyanobacterium

Test 6 – Fungi

10 Questions

1. The main component of most fungal cell walls is:

Chitin Cellulose Pectin Dextrin

Correct answer: Chitin

2. Yeast is a:

Unicellular fungus Bacterium Protozoan Virus

Correct answer: Unicellular fungus

3. Saccharomyces cerevisiae is used industrially for production of:

Ethanol Tetracycline Butanol Only citric acid

Correct answer: Ethanol

4. Asexual reproduction in Penicillium occurs by:

Conidiospores Ascospores Oospores Basidiospores

Correct answer: Conidiospores

5. Basidiomycetes include:

Puffballs and birds nest fungi Peziza and truffles only Claviceps and Morchella only Rhizopus and Mucor only

Correct answer: Puffballs and birds nest fungi

6. Exogenously produced sexual spores in Agaricus are:

Basidiospores Ascospores Oospores Zygospores

Correct answer: Basidiospores

7. Closed ascocarp is called:

Cleistothecium Apothecium Perithecium Hysterothecium

Correct answer: Cleistothecium

8. Deuteromycetes are called imperfect fungi because:

Only the asexual/vegetative phase is known They lack mycelium They have no spores They are all unicellular

Correct answer: Only the asexual/vegetative phase is known

9. Morels and truffles belong to:

Ascomycetes Basidiomycetes Deuteromycetes Phycomycetes

Correct answer: Ascomycetes

10. Ergot of rye is caused by:

Claviceps purpurea Ustilago Phytophthora Alternaria

Correct answer: Claviceps purpurea

Test 7 – Fungal Reproduction & Diseases

10 Questions

1. Sexual reproduction in fungi does NOT involve:

Zoospores as sexual spores Oospores Ascospores Basidiospores

Correct answer: Zoospores as sexual spores

2. A dikaryon is formed when:

Two haploid cells/nuclei do not fuse immediately Meiosis is completed The cell loses its nucleus Only cytoplasm is absent

Correct answer: Two haploid cells/nuclei do not fuse immediately

3. Secondary mycelium in club fungi represents the:

Dikaryophase Haplophase Diplophase Coenocytic phase

Correct answer: Dikaryophase

4. Loose smut of wheat is caused by:

Ustilago Claviceps Albugo Phytophthora

Correct answer: Ustilago

5. White rust of crucifers is caused by:

Albugo Candida Claviceps Alternaria Ustilago

Correct answer: Albugo Candida

6. Late blight of potato is caused by:

Phytophthora infestans Alternaria solani Ustilago nuda Xanthomonas

Correct answer: Phytophthora infestans

7. Early blight of potato is caused by:

Alternaria solani Phytophthora infestans Claviceps purpurea Albugo

Correct answer: Alternaria solani

8. Aflatoxin is produced by:

Aspergillus flavus Penicillium Fusarium Colletotrichum

Correct answer: Aspergillus flavus

9. The fungal group characterized by aseptate, coenocytic mycelium includes:

Phycomycetes Basidiomycetes Ascomycetes Deuteromycetes

Correct answer: Phycomycetes

10. In Phycomycetes, asexual reproduction may occur through:

Zoospores and aplanospores Basidiospores only Ascospores only Conidia only

Correct answer: Zoospores and aplanospores

Test 8 – Viruses, Viroids & Prions

10 Questions

1. Viruses generally contain:

Either DNA or RNA Both DNA and RNA in every virus Only proteins Only lipids

Correct answer: Either DNA or RNA

2. Viruses are best described as:

Obligate intracellular parasites Free-living bacteria Multicellular fungi Facultative parasites

Correct answer: Obligate intracellular parasites

3. Viruses do not belong to:

Any of the five kingdoms Monera only Protista only Fungi only

Correct answer: Any of the five kingdoms

4. Who first crystallised and isolated viruses?

W.M. Stanley D.J. Ivanowsky M.W. Beijerinck Robert Hooke

Correct answer: W.M. Stanley

5. Tobacco mosaic virus is approximately:

300 nm long and 20 nm in diameter 700 nm long and 30 nm in diameter 300 nm long and 5 nm in diameter 30 nm long and 300 nm in diameter

Correct answer: 300 nm long and 20 nm in diameter

6. Viruses that infect bacteria are called:

Bacteriophages Viroids Prions Mycoplasmas

Correct answer: Bacteriophages

7. Viroids are characterized by:

Low-molecular-weight RNA without a protein coat DNA inside a protein coat Abnormally folded proteins Double-stranded DNA only

Correct answer: Low-molecular-weight RNA without a protein coat

8. Interferons are:

Proteins that increase resistance to viral attack Glycolipids Bacterial cell walls Viral nucleic acids

Correct answer: Proteins that increase resistance to viral attack

9. Prions consist essentially of:

Abnormally folded proteins RNA only DNA only Peptidoglycan

Correct answer: Abnormally folded proteins

10. A virus that infects plants commonly has:

ss-RNA Only ds-DNA Only ss-DNA Only ds-RNA

Correct answer: ss-RNA

Test 9 – Applied Biology & Microorganisms

10 Questions

1. Cholera is caused by:

Vibrio cholerae Salmonella typhi Xanthomonas citri Agrobacterium tumefaciens

Correct answer: Vibrio cholerae

2. Typhoid is caused by:

Salmonella typhi Vibrio cholerae Plasmodium Trypanosoma

Correct answer: Salmonella typhi

3. Citrus canker is a:

Bacterial plant disease Viral disease Fungal disease Protozoan disease

Correct answer: Bacterial plant disease

4. Crown gall is caused by:

Agrobacterium tumefaciens Xanthomonas citri Ustilago Claviceps

Correct answer: Agrobacterium tumefaciens

5. An association between roots of higher plants and fungi is called:

Mycorrhiza Lichen BGA Fern

Correct answer: Mycorrhiza

6. Fungi exhibit which type of heterotrophic nutrition?

Absorptive Photosynthetic Ingestive only Chemosynthetic

Correct answer: Absorptive

7. Important decomposers of dead plant and animal material include:

Saprophytic bacteria and saprotrophic fungi Only animals Only plants Only viruses

Correct answer: Saprophytic bacteria and saprotrophic fungi

8. Citric acid is commercially produced using:

Aspergillus niger Penicillium citrinum Lactobacillus bulgaricus Rhizopus nigricans

Correct answer: Aspergillus niger

9. Heterotrophic bacteria are important in:

Curd/yogurt and antibiotic production Only photosynthesis Only methane production Only virus formation

Correct answer: Curd/yogurt and antibiotic production

10. Plant symptoms such as mosaic formation, leaf rolling and yellowing are commonly associated with:

Viral diseases Only fungal diseases Only bacterial diseases Only mycoplasmal diseases

Correct answer: Viral diseases

Test 10 – Mixed Revision

10 Questions

1. Which organism possesses characteristics of both plant and animal?

Euglena Bacteria Mycoplasma Paramecium

Correct answer: Euglena

2. The chief producers in oceans among the listed protists are:

Diatoms Slime moulds Euglenoids Plasmodium

Correct answer: Diatoms

3. Red tides are commonly associated with:

Dinoflagellates Diatoms Euglenoids Slime moulds

Correct answer: Dinoflagellates

4. Amoeboid protozoan movement is by:

Pseudopodia Flagella Cilia Hyphae

Correct answer: Pseudopodia

5. The vegetative body of plasmodial slime moulds is:

Plasmodium Basidium Ascocarp Mycelium

Correct answer: Plasmodium

6. Slime moulds form fruiting bodies under:

Unfavourable conditions Only favourable conditions Continuous darkness High salinity only

Correct answer: Unfavourable conditions

7. Which kingdom contains eukaryotic, achlorophyllous, heterotrophic, spore-forming organisms?

Fungi Monera Plantae Animalia

Correct answer: Fungi

8. Which group has maximum nutritional diversity according to the source?

Monera Plantae Fungi Animalia

Correct answer: Monera

9. Which organism has nuclear dimorphism?

Paramecium Amoeba Trypanosoma Plasmodium

Correct answer: Paramecium

10. Which statement about viruses is correct?

They can be crystallised They possess their own metabolic system They are facultative parasites Antibiotics readily kill them

Correct answer: They can be crystallised