Most Important MCQ On Biological Classification Chapter Based 2 Chapter.

 Questions Based on NCERT Textbook.

Q1 Plague is caused by … .. [ JKCMEE 1999]
 a) Xanthomonas
 b) Pasteurella pestis
 c) Varicella virus
 d) Pseudomonas

Q2) Bacteria involved in two-step conversion of ammonia into nitrate are … [ CPMT 2004]
 a) Azotobacter and Nitrosomonas
 b) Pseudomonas and Nitrobacter
 c) Azotobacter and Achromobacter
 d) Nitrosomnas and Nitrobacter

Q3) Heterocysts, specialized for nitrogen fixation, occur in certain … .. [ BHU 1995]
 a) Red algae( batrachospermum)
 b) Green algae ( Spirogyra)
 c) Blue-green algae (Anabaena)
 d) Brown algae ( Laminaria)

Q4) Smallest organisms, self reproducing in the living state are … [ BHU 2012]
 a) Bacteria
 b) PPLO
 c) Prions
 d) Viruses

Q5) Genetic material of retroviruses is … .. [ MPPMT 2007]
 a) DNA
 b) RNA
 c) DNA and RNA
 d) Nucleoprotein complexes

Q6) Cell wall is absent in : [ ReAIPMT 2015]
 a) Nostoc
 b) Aspergillus
 c) Funaria
 d) Mycoplasma

Q7)  Which of the following statements is wrong for viroids? …[AIPMT-2016]
 a) They lack a protein coat
 b) They are smaller than viruses
 c) They cause infections
 d) Their RNA is of high molecular weight

Q8)  A filament of Nostoc without its mucilage sheath is called … [ AIIMS 1998]
 a) Mycelium
 b) Trichome
 c) Hypha
 d) Colony

Q9) Wine turns sour … .. [ MPPMT 1991 ]
 a) On exposure to light
 b) Contamination by aerobic bacteria Acetobacter aceti
 c) Contamination by anaerobic bacteria
 d) On heating

Q10) Which do not give out O2 … [ CPMT 2003]
 a) Green algae
 b) Blue green algae
 c) Green plants
 d) Photosynthetic bacteria

Q11) Organism useful in degrading organic pollutants is … [ DPMT 2001]
 a) Pseudomonas
 b) Nitrosomonas
 c) Chlamydia
 d) Actinomycetes

Q12) Chemoautotrophs derive their energy from … .. [ Pb PMT 1998]
 a) Sun
 b) Inorganic chemicals
 c) Dead organisms
 d) Living organisms
Q13) In Whittaker’s classification, non-nucleated unicellular organisms/ prokaryotes are included under … .. [ BHU 1997]
 a) Plantae
 b) Monera
 c) Protista
 d) Animalia

Q14) Sever Acute Respiratory Syndrome ( SARS) … .. [ AIIMS 2008]
 a) Affects non-vegetarians faster than vegetarians
 b) Is an acute form of asthma
 c) Is caused by variant of Common Cold Virus ( Corona Virus)
 d) Is caused by variant of Pneumococcus pneumonia.

Q15) Viruses posses … .. [ BHU 2008]
 a) DNA only
 b) Nucleic acid, DNA or RNA
 c) Protein only
 d) Nucleic acid and protein

Q16) Fungal cell wall is formed of … [ Manipur 2006]
 a) Pectin
 b) Hemicellulose
 c) Chitin and Cellulose
 d) Chitin and pectin

Q17) Which is not true for fungi imperfecti? … [ Pb. PMT 2007]
 a) They do not have sexual phase
 b) They include toad stools, puff balls and stink horns
 c) They do not include Aspergillus, the fungus used in making soya sauce
 d) They include species that prey on nematodes

Q18) Malaria fever is controlled by the drug .. [ RPMT 2006]
 a) Penicillin
 b) DDT
 c) Streptomycin
 d) Quinine

Q19) In Amoeba and Paramecium  osmoregulation occurs through …. [ BHU 1996]
 a) Pseudopodia
 b) Nucleus
 c) Contractile vacuole
 d) General surface

Q20) In which group of organisms the cells walls form two thin overlapping shells which fit together ? [ ReAIPMT 2015]
 a) Slime mould
 b) Chrysophytes
 c) Euglenoids
 d) Dinoflagellates

Q21) Macro molecule chitin is …[NEET 2013]
 a) Nitrogen containing polysaccharide
 b) Phosphorus containing polysaccharide
 c) Sulphur containing polysaccharide
 d) Simple polysaccharide

Q22) Pigment-containing membranous extensions in some cyanobacteria are .. [NEET 2013]
 a) Heterocysts
 b) Basal bodies
 c) Pneumatophores
 d) Chromatophores

Q23) True nucleus is absent in : …[AIPMT 2015]
 a) Volvox
 b) Anabaena
 c) Mucor
 d) Vaucheria

Q24) Which one of the following matches is correct? …[AIPMT 2015]
 a) Agaricus → Parasitic fungus → Basidiomycetes
 b) Phytophthora → Aseptate mycelium → Basidiomycetes
 c) Alternaria → Sexual reproduction absent → Deuteromycetes
 d) Mucor → Reproduction by Conjugation → Ascomycetes.

Q25) Recurrence of high temperature in malaria at intervals is due to completion of …. [ AIIMS 1996]
 a) Erythrocytic schizodont
 b) Sporogony
 c) Gamogony
 d) Exoerythrocytic schizogony

Q26) The highest number of species among the following belong to …. [ CBSE 2012]
 a) Fungi
 b) Mosses
 c) Algae
 d) Lichens

Q27) In endomycorrhiza, the fungus is generally … [ AMU 2003]
 a) Ascomycetes
 b) Zygomycetes
 c) Basidiomycetes
 d) Deuteromycetes

Q28) The deadliest mushroom is … [ kerala 2003]
 a) Agaricus
 b) Pleurotus
 c) Amanita
 d) Volvariella

Q29) Edible part of Mushroom is … {B.H.U. 2006]
 a) Basidiocarp
 b) Primary mycelium
 c) Basidiospores
 d) Fungal hyphae

Q30) Yeast is important source of … [ BHU 1999]
 a) Proteins
 b) Riboflavin
 c) Vitamin C
 d) Sugar

Q31 Fungi are always …. [AFMC 2001]
 a) Heterotrophs
 b) Saprophytes
 c) Parasites
 d) Autotrophs

Q32 Late blight of Potato is due to … [ BHU 2006]
 a)Alternaria solani
 b) Albugo candida
 c) Fusarium moniliforme
 d) Phytophthora infestans

Q33 Which one produces alcohol?
 a) Clostridium botulinum
 b) Leuconostoc citrovorum
 c) Saccharomyces cerevisiae
 d) Torulopsis utilis.

Q34 Which one is a protozoan disease
 a) AIDS
 b) Taeniasis
 c) Polio
 d) Malaria

Q35 Fungi can be stained by … [ JIPMER 1999]
 a) Cotton blue
 b) Safranine
 c) Glycerine
 d) Lactophenol

Q36 Heterotrophic fungi can live as … [ AMU 2010]
 a) Parasite
 b) Saprophyte
 c) Symbiont
 d) All the above

Q37 Red tide is caused by … .. [ BHU 1997]
 a) Gonyaulax
 b) Noctiluca
 c) Ceratium
 d) None of the above

Q38 Which of the following is not a locomotory organelle of protozoans … [ AFMC 2005]
 a) Pseudopodia
 b) Cilia
 c) Flagella
 d) Parapodia

Q39 Amoebiasis is prevented by
 a) Eating balanced food
 b) Eating plenty of fruits
 c) Drinking boiled water
 d) Using mosquito net

Q40 Malaria fever coincides with liberation of …. [ AFMC 2001]
 a) Crytomerozoites
 b) Metacryptomerozoites
 c) Merozoites
 d) Trophozoites

Q41 Common trait between Amoeba and leucocyte is .. [ WB 2007]
 a) Encystment
 b) Pseudopodia
 c) Sporulation
 d) Contractile vacuole

Q42 Which pair belongs to basidiomycetes .. [ CBSE 2007]
 a) Puffball and Claviceps
 b) Peziza and Stink Horn
 c) Morchella and Mushroom
 d) Bird Nest Fungus and Puffball

Q43 Sandfly is a causative agent of … [ AFMC 2010]
 a) Kala-azar
 b) Sleeping sickness
 c) Typhoid
 d) Dysentery

Q44 Trypanosoma causes … [ AFMC 2003]
 a) Dysentery
 b) Sleeping sickness
 c) Malaria
 d) Plague

Q45 Chief advantage of encystment to an Amoeba is … [ CBSE 2003]
 a) Ability to survive during adverse physical conditions
 b) Ability to live for some time without ingesting food
 c) Protection from parasites and predators
 d) d) Chance to get rid of accumulated products

Q46 Amoeba is immortal. It occurs all over the world due to
 a) Binary fission
 b) Conjugation
 c) Spores
 d) Regeneration

Q47 Malignant tertian malaria is due to … [ AIIMS 2000]
 a) Plasmodium falciparum
 b) P. vivax
 c) P. ovale
 d) P. malariae

Q48) Viruses are non-cellular organisms but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?

(A) Monera

(B) Protista

(C) Fungi

(D) None of these.

Q49) With respect to the fungal sexual cycle, choose the correct sequence of events

(A) Karyogamy, plasmogamy and meiosis

(B) Meiosis, plasmogamy and karyogamy

(C) Plasmogamy, karyogamy and meiosis

(D) Meiosis, karyogamy and plasmogamy

Q50) Difference between virus and viroid is

(A) Absence of protein coat in viroid but present in virus

(B) Presence of low molecular weight RNA in virus but absent in viroid

(C) Both (a) and (b)

(D) None of the above.

Q51 Association between mycobiont and phycobiont are found in

(A) Mycorrhiza

(B) Root

(C) Lichens

(D) BGA

Q52) Contagium vivum fluidum was proposed by

(A) D. J. Ivanowsky

(B) M. W. Beijerinck

(C) Stanley

(D) Robert Hooke

Q53 A dikaryon is formed when

(A) Meiosis is arrested

(B) The two haploid cells do not fuse immediately

(C) Cytoplasm does not fuse

(D) None of the above

Q54)  All eukaryotic unicellular organisms belong to

(A) Monera

(B) Protista

(C) Fungi

(D) Bacteria

Q55) Organisms living in salty areas are called as

(A) Methanogens

(B) Halophiles

(C) Heliophytes

(D) Thermoacidophiles.

Q56) Naked cytoplasm, multinucleated and saprophytic are the characteristics of

(A) Monerans

(B) Protiststs

(C) Fungi

(D) Slime moulds.

 Q57) An association between roots of higher plants and fungi is called

(A) Lichen

(B) Fern

(C) Mycorrhiza

(D) BG

Q58) True nucleus is absent in : …[AIPMT 2015] 
 a) Volvox  
 b) Anabaena  
 c) Mucor  
 d) Vaucheria

Q59) Recurrence of high temperature in malaria at intervals is due to completion of …. [ AIIMS 1996] 
 a) Erythrocytic schizodont  
 b) Sporogony  
 c) Gamogony  
 d) Exoerythrocytic schizogony.

Q60) Which one of the following shows isogamy with non-flagellated gametes? ….[AIPMT 2014] 
 a) Ulothrix  
 b) Spirogyra  
 c) Sargassum  
 d) Ectocarpus

Answers are below:-
 Q1)  B)
 Q2)  D)
 Q3)  C)
 Q4)  B)
 Q5)  B)
 Q6)  D)
 Q7)  D)
 Q8)  B)
 Q9)  B)
Q10) D)
Q11) A)
Q12) B)
Q13) B)
Q14) C)
Q15) D)
Q16) D)
Q17) B)
Q18) D)
Q19) C)
Q20) B)
Q21) A)
Q22) D)
Q23) B)
Q24) C)
Q25) A)
Q26) A)
Q27) B)
Q28) C)
Q29) C)
Q30) B)
Q31) A)
Q32) D)
Q33) C)
Q34) D)
Q35) A)
Q36) D)
Q37) A)
Q38) D)
Q39) C)
Q40) C)
Q41) B)
Q42) D)
Q43) A)
Q44) B)
Q45) A)
Q46) C)
Q47) A)
Q48) D)
Q49) C)
Q50) A)
Q51) C)
Q52) B)
Q53) B)
Q54) B)
Q55) B)
Q56) D)
Q57) C)
Q58) B)
Q59) A)
Q60) B)

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