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Biological Classification Viruses, Viroids, Prions And Kingdome Monera MCQ
Quiz 13
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Q.1
Chloramphenicol/ chloromycetin is produced by … .. [ AIIMS 2001]
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a) Streptomyces rimosus
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b) Streptomyces venezuelae
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c) Streptomyces griseus
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d) Streptomyces scoleus
Explanation
Answer : (b)
Q.2
Gram (+) and Gram (-) forms of bacteria are differentiable through staining with … [ CET Chd1997]
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a) Safranin + Gentian Violet
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b) Safranin + Iodine
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c) Acetocarmine + Iodine
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d) Crystal Violet + Iodine
Explanation
Answer : (d)
Q.3
In Whittaker’s classification, non-nucleated unicellular organisms/ prokaryotes are included under … .. [ BHU 1997]
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a) Plantae
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b) Monera
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c) Protista
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d) Animalia
Explanation
Answer : (b)
Q.4
Phages which show lysogenic cycle are known as … .. [ JIPMER 1997]
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a) Lytic phages
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b) Temperate phages
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c) Virulent phages
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d) Avirulent phages
Explanation
Answer : (b)
Q.5
Black death is … … [ MPPMT 1995]
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a) Cancer
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b) Plague
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c) AIDS
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d) Gonorrhoea
Explanation
Answer : (b)
Q.6
In which bacterial reproduction phage is required …. [ CET Chd. 2000]
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a) Conjugation
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b) Transformation
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c) Binary fission
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d) Transduction
Explanation
Answer : (d)
Q.7
Staphylococcus has … … [ MPPMT 1998 ]
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a) Cubical colony
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b) Bunch-like irregular colony
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c) Chain like colony
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d) Plate like colony
Explanation
Answer : (b)
Q.8
Procaryotes possess … [ JKCMEE 1999]
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a) Nucleus
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b) Nucleoid
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c) Nucleolus
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d) Nucellus
Explanation
Answer : (b)
Q.9
Leprosy is caused by … . [ Bih PMT 1995]
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a) Spirillum
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b) Mycobacterium
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c) Pseudomonas
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d) Bibrio
Explanation
Answer : (b)
Q.10
Modern system of classification divided organisms into Kingdoms … .. [ Har PMT 2005]
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a) 1
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b) 2
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c) 4
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d) 5
Explanation
Answer : (d)
Q.11
Thermococcus, Methanococcus and Methanobacterium exemplify … [ CBSE 2008]
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a) Bacteria whose DNA is relaxed or positively supercoiled but which has a cytoskeleton as well as mitochondria
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b) Bacteria that contain a cytoskeleton and ribosome
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c) Archaebacteria that contain protein homologous to eukaryotic core histones
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d) Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Explanation
Archaeal histones have significant sequence and structural similarity to their eukaryal counterparts DNA is positively supercoiled by archaeal nucleosomes. Answer : (c)
Q.12
Bacterial plasmids are … [ CBSE 1997]
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a) Circular dsRNA
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b) Circular dsDNA
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c) Linear dsDNA
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d) Linear dsRNA
Explanation
Answer : (b)
Q.13
Heat killed S-cell along with live R-cells of Diplococcus pneumonia where injected in mice .. [ kerala 2002]
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a) Mice survived and had live S-cells
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b) Mice survived and had dead R-cells
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c) Mice died and had dead R-cells
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d) Mice died and showed live S-cells
Explanation
Answer : (d)
Q.14
Two bacteria commonly employed in genetic engineering are … .. [ CBSE 1998]
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a) Rhizobium and Diplococcus
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b) Escherichia and Agrobacterium
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c) Nitrobacter and Azotobacter
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d) Nitrosomonas and Klebsiella
Explanation
Answer : (b)
Q.15
All bacterial cells get stained with … [ MPPMT 1999]
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a) Mercuric chloride
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b) Crystal violet
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c) Crystal violet + iodine
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d) Safranin
Explanation
Answer : (b)
Q.16
One of the useful activities of several bacteria is … [ MPPMT 1998]
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a) Nitrification
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b) Biogeochemical cycles
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c) Nitrogen fixation
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d) Sulphurification
Explanation
Answer : (b)
Q.17
When milk is heated at 62°C for 30 minutes and then cooled, the process is called …… [ CBSE 1996 ]
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a) Sterilization
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b) Pasteurisation
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c) Nitrification
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d) Freezing
Explanation
Answer : (b)
Q.18
Organisms without any specific shape are … [ MPPMT 1997]
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a) Viruses
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b) Mycoplasmas
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c) Bacteria
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d) Cyanobacteria
Explanation
Answer : (b)
Q.19
Chemoautotrophs derive their energy from … .. [ Pb PMT 1998]
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a) Sun
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b) Inorganic chemicals
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c) Dead organisms
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d) Living organisms
Explanation
Answer : (b)
Q.20
Transfer of genetic information through transduction involves … [ CBSE 1998]
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a) Conjugation
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b) Bacteriophage released from donor cell
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c) Another bacterium
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d) Physical contact between donor and recipient strains
Explanation
Answer : (b)
Q.21
Azotobacter and Bacillus polymyxa are … [ CBSE 1996]
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a) Decomposers
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b) Non-symbiotic nitrogen fixer
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c) Symbiotic nitrogen fixer
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d) Pathogenic bacteria
Explanation
Answer : (b)
Q.22
Which do not give out O2 … [ CPMT 2003]
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a) Green algae
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b) Blue green algae
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c) Green plants
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d) Photosynthetic bacteria
Explanation
Answer : (d)
Q.23
Heterocysts present in Nostoc are specialized for … .. [ MPPMT 1990]
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a) Fragmentation
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b) Nitrogen fixation
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c) Storage
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d) Photosynthesis
Explanation
Answer : (b)
Q.24
During conjugation, bacteria attach by means of … .. [ RPMT 1998]
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a) Flagella
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b) Pili
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c) Cilia
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d) Hair
Explanation
Answer : (b)
Q.25
Wine turns sour … .. [ MPPMT 1991 ]
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a) On exposure to light
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b) Contamination by aerobic bacteria Acetobacter aceti
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c) Contamination by anaerobic bacteria
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d) On heating
Explanation
Answer : (b)
Q.26
A filament of Nostoc without its mucilage sheath is called … [ AIIMS 1998]
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a) Mycelium
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b) Trichome
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c) Hypha
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d) Colony
Explanation
Answer : (b)
Q.27
The motile bacteria are able to move by : …[AIPMT 2014]
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a) cilia
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b) pili
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c) fimbriae
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d) flagella
Explanation
Answer:(d)
Q.28
Archaebacteria differ from eubacteria in : ….[AIPMT 2014]
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a) Cell shape
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b) Mode of reproduction
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c) Cell membrane structure
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d) Mode of nutrition
Explanation
Answer:(c)
Q.29
Viruses have : …[AIPMT 2014]
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a) Single chromosome
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b) Both DNA and RNA
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c) DNA enclosed in a protein coat
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d) Prokaryotic nucleus
Explanation
Answer:(d)
Q.30
Which of the following shows coiled RNA strand and capsomeres ? [AIPMT 2014]
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a) Measles virus
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b) Retrovirus
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c) Poliovirus
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d) Tobacco mosaic virus
Explanation
Answer:(d)
Q.31
Which one of the following is not an inclusion body found in prokaryotes? …[AIPMT 2015]
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a) Polysome
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b) Phosphate granule
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c) Cyanophycean granule
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d) Glycogen granule
Explanation
Answer:(a)
Q.32
The active form of Entamoeba histolytica feeds upon: …[AIPMT 2015]
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a) blood only
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b) erythrocytes; mucosa and submucosa of colon
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c) mucosa and submucosa of colon only
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d) food in intestine
Explanation
Answer:(b)
Q.33
Which of the following statements is wrong for viroids? …[AIPMT-2016]
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a) They lack a protein coat
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b) They are smaller than viruses
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c) They cause infections
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d) Their RNA is of high molecular weight
Explanation
Answer:(d)
Q.34
Which of the following is not a feature of the plasmids? …[AIPMT-2016]
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a) Independent replication
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b) Circular structure
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c) Transferable
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d) Single - stranded
Explanation
Answer:(d)
Q.35
Which of the following rRNAs acts as structural RNA as well as ribozyme in bacteria ? …[NEET 2016]
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a) 23 S rRNA
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b) 5.8 S rRNA
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c) 5 S rRNA
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d) 18 S rRNA
Explanation
Answer:(a)
Q.36
Methanogens belong to : …[NEET 2016]
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a) Dinoflagellates
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b) Slime molds
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c) Eubacteria
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d) Archaebacteria
Explanation
Answer:(d)
Q.37
Which of the following are found in extreme saline conditions? ….[NEET- 2017]
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a) Archaebacteria
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b) Eubacteria
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c) Cyanobacteria
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d) Mycobacteria
Explanation
Archaebacteria are able to survive in harsh conditions because of branched lipid chain in cell membrane which reduces fluidity of cell membrane. Halophiles are exclusively found in saline habitats. Answer:(a)
Q.38
Which of the following are found in extreme saline conditions? ….[NEET- 2017]
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a) Archaebacteria
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b) Eubacteria
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c) Cyanobacteria
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d) Mycobacteria
Explanation
Archaebacteria are able to survive in harsh conditions because of branched lipid chain in cell membrane which reduces fluidity of cell membrane. Halophiles are exclusively found in saline habitats. Answer:(a)
Q.39
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? ….[NEET- 2017]
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a) Bacillus
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b) Pseudomonas
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c) Mycoplasma
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d) Nostoc
Explanation
Mycoplasmas are smallest, wall-less prokaryotes, pleomorphic in nature. These are pathogenic on both plants and animals Answer:(c)
Q.40
Viroids differ from viruses in having : ….[NEET- 2017]
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a) DNA molecules with protein coat
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b) DNA molecules without protein coat
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c) RNA molecules with protein coat
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d) RNA molecules without protein coat
Explanation
Viroids are sub-viral agents as infectious RNA particles, without protein coat. Answer:(d)
Q.41
Which of the following components provides sticky character to the bacterial cell? ….[NEET- 2017]
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a) Cell wall
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b) Nuclear membrane
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c) Plasma membrane
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d) Glycocalyx
Explanation
Sticky character of the bacterial wall is due to glycocalyx or slime layer. This layer is rich in glycoproteins. Answer:(d)
Q.42
Cell wall is absent in : [ ReAIPMT 2015]
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a) Nostoc
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b) Aspergillus
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c) Funaria
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d) Mycoplasma
Explanation
Answer:(d)
Q.43
Select the wrong statement : [ ReAIPMT 2015]
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a) Mosaic disease in tobacco and AIDS in human being are caused by viruses
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b) The viroids were discovered by D.J. Ivanowski
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c) W.M. Stanley showed that viruses could be crystallized
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d) The term 'contagium vivum fluidum' was coined by M.W. Beijerinck
Explanation
Answer:(b)
Q.44
Engler and Prantl published a phylogenetic system in the monograph … [ kerala 2005]
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a) Genera Plantarum
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b) Origin of Species
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c) Die Naturlichen Pflazenfamilien
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d) Species Plantarum
Explanation
Die Natürlichen Pflanzenfamilien by Adolf Engler and Karl Anton Prantl is a complete revision of plant families down to generic level and often even further. As such it forms part of the Engler system of plant taxonomy. Answer : (c)
Q.45
Bacteria involved in two-step conversion of ammonia into nitrate are … [ CPMT 2004]
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a) Azotobacter and Nitrosomonas
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b) Pseudomonas and Nitrobacter
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c) Azotobacter and Achromobacter
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d) Nitrosomnas and Nitrobacter
Explanation
Answer : (d)
Q.46
Heterocysts, specialized for nitrogen fixation, occur in certain … .. [ BHU 1995]
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a) Red algae( batrachospermum)
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b) Green algae ( Spirogyra)
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c) Blue-green algae (Anabaena)
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d) Brown algae ( Laminaria)
Explanation
Answer : (c)
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