Q.1
One of the free living anaerobic nitrogen fixer is ( C.B.S.E. 2010)
  • a) Rhodospirillum
  • b) Rhizobium
  • c) Azotobacter
  • d) Beijerinckia
Q.2
Gram stain represents … [CPMT 1991]
  • a) A technique for staining bacteria and developed by Gram
  • b) A stain got from Gram
  • c) A cytochemical technique for differentiation of mitochondria
  • d) A trade name
Q.3
Which statement is wrong about viruses … [ CBSE 2012]
  • a) All are parasites
  • b) All of them have helical symmetry
  • c) They have the ability to synthesize nucleic acids and proteins
  • d) Antibiotics have no effect on them
Q.4
Two kingdoms figuring in all biological classification are … … [ JKCMEE 2008]
  • a) Protista and Planate
  • b) Protista and Animalia
  • c) Monera and Animalia
  • d) Plantae and Animalia
Q.5
Transfer of DNA from one bacterium to another through cell contact is … [ kerala 2002]
  • a) a) transformation
  • b) Transduction
  • c) c) Conjugation
  • d) Transcription
Q.6
Which of the following is correct about legumes? …. [ AFMC 1999]
  • a) They are incapable of fixing nitrogen
  • b) They fix nitrogen with the help of bacteria that live in their leaves
  • c) They fix nitrogen with the help of bacteria that live in their roots
  • d) They fix nitrogen independent of bacteria
Q.7
Viruses are … .. [ KCET 1998]
  • a) Obligate parasites
  • b) Obligate saprophytes
  • c) Partial parasites
  • d) Facultative parasites
Q.8
In Whittaker’s classification, non-nucleated unicellular organism/ prokaryotes are included under … [ BHU 1997]
  • a) Plantae
  • b) Monera
  • c) Protista
  • d) Animalia
Q.9
A few organisms are known to multiply at 10° – 108°C. They are probably .. .. [ CBSE 1998]
  • a) Thermophilic sulphur bacteria
  • b) Thermophilic subaerial fungi
  • c) Hot spring blue-green algae
  • d) Marine archaebacteria
Q.10
Grown gall disease of plants is caused by ….. [ BHU 2005]
  • a) Ti-plasmid
  • b) Pi-plasmid
  • c) Virus
  • d) Protozoan
Q.11
The common nitrogen fixer in paddy field is ( C.B.S.E 2010)
  • a) Azospirillum
  • b) Oscillatoria
  • c) Frankia
  • d) Rhizobium
Q.12
Bacterial size is ....
  • a) 2 – 10 µm
  • b) 10 – 15 µm
  • c) 100 -200 µm
  • d) 15 -50 µm
Q.13
When a bacterial cell possesses a flagellum on its anterior and posterior sides, the condition is called …
  • a) Peritrichous
  • b) Lophotrichous
  • c) Amphitrichous
  • d) Monotrichous
Q.14
A phylum common to unicellular animals and plants is … .. [ DPMT 2009]
  • a) Monera
  • b) Plantae
  • c) Fungi
  • d) Protista
Q.15
Golgi apparatus does not occur in … [ BHU 2008]
  • a) yeast
  • b) Liver cells
  • c) Higher plants
  • d) Bacteria and blue green algae
Q.16
Which is excluded from Whittaker’s five kingdom classification
  • a) Algae
  • b) Fungi
  • c) Bacteria
  • d) Viruses
Q.17
Bacteriophage is … [ JKCMEE 2004]
  • a) Virus attacking bacteria
  • b) Virus attacking virus
  • c) Bacterium attacking virus
  • d) Stage in bacterial life cycle
Q.18
Bacteriophage is … .. [ HPPMT 1995 ]
  • a) Mycoplasma
  • b) Virus
  • c) Rickettsia
  • d) Spirochaete
Q.19
In Whittaker’s five kingdom classification, eukaryotes are assigned to … .. [ BHU 1994]
  • a) All the five kingdoms
  • b) Only four kingdoms
  • c) Only three kingdoms
  • d) Only two kingdoms
Q.20
Tobacco mosaic virus/ virus was crystallized for the first time by .. .. [ AMU 1998 ]
  • a) Edward Jenner
  • b) Louis Pasteur
  • c) Andre Lwoff
  • d) W.N. Staley
Q.21
The infectious and contagious bacterial disease that affects cattle, buffaloes, horses, sheep and goats is … [ JKCMEE 2010]
  • a)Anthrax
  • b) Necrosis
  • c) Tick fever
  • d) Rinderpest
Q.22
Name the organisms which do not derive energy directly or indirectly from sun … .. [ CBSE 1991]
  • a) Chemosynthetic bacteria
  • b) Pathogenic bacteria
  • c) Symbiotic bacteria
  • d) Mould
Q.23
Cyanobacteria are useful biofertilizers in fields of … [ Manipur 2006]
  • a) Wheat
  • b) Maize
  • c) Rice
  • d) Sugarcane
Q.24
In some viruses, RNA is present instead of DNA indicating that … .. [ CBSE 1995 ]
  • a) Their nucleic acid must combine with host DNA before replication
  • b) They cannot replicate
  • c) There is no hereditary information
  • d) RNA can act to transfer heredity
Q.25
Bacteria connected with acetogenesis is … [ MHTCET 2007]
  • a) Streptomonas
  • b) Clostridium
  • c) Bacillus
  • d) Citromonas
Q.26
Transformation experiments were first performed over bacterium … . [ CBSE 2002]
  • a) Escherichia coli
  • b) Salmonella typhimurium
  • c) Diplococcus pneumoniae
  • d) Pasteurella pestis
Q.27
Virus attacking blue-green algae is known as … .. [ Odisha 1995]
  • a) Cyanophage
  • b) Coliphage
  • c) Bacteriophage
  • d) Zoophage
Q.28
T-bacteriophages possess … .. [ JIPMER 1996]
  • a) Round shape
  • b) Tadpole shape
  • c) Irregular shape
  • d) Rhomboid shape
Q.29
Four kingdome classification was proposed by …… [ BHU 1994]
  • a) Whittaker
  • b) Copeland
  • c) Haeckel
  • d) Linnaeus
Q.30
Halophilic archaebacterium ( Halobacterium salinarum ) found in Great Salt Lake and Dead Sea cannot live in … . [ Pb PMT 2005]
  • a) Less than 3M NaCl concentration
  • b) Less than 5M NaCl concentration
  • c) More than 5 M NaCl concentration
  • d) More than 3M NaCl concentration
Q.31
Biofertiliser for Soya Bean crop is … [ CBSE 2011]
  • a) Rhizobium
  • b) Nostoc
  • c) Azotobacter
  • d) Azospirillum
Q.32
In bacteria, sex is determined by presence of … .. [ RPMT 1991]
  • a) Pili
  • b) Episome
  • c) Mesosome
  • d) Flagella
Q.33
Amphitrichous flagellation has … [ Odisha 2007]
  • a) Flagella absent
  • b) Flagella at one end
  • c) Flagella at both the ends
  • d) Flagella all around
Q.34
Which one does not have eukaryotic organization? [ KCET 2005]
  • a) Green algae
  • b) Blue green algae
  • c) Red algae
  • d) Golden brown algae
Q.35
Tailed bacteriophage is … .. [ CBSE 1995]
  • a) Non-motile
  • b) Actively motile in water
  • c) Motile on bacterial surface
  • d) Motile on surface of plant leaves
Q.36
A plasmid .. [ Har PMT 2007]
  • a) Cannot replicate
  • b) Shows independent assortment
  • c) Lies along with chromosome
  • d) Can replicate independently
Q.37
Protein cover of virus is … [ AFMC 2005]
  • a) Capsid
  • b) Virion
  • c) Viroid
  • d) Bacterial wall
Q.38
Common genetic material of bacteriophage is …[ Bih PMT 1996]
  • a) RNA
  • b) DNA
  • c) RNA and DNA
  • d) DNA and mRNA
Q.39
In Whittaker’s five kingdom classification, unicellular eucryotes primarily aquatic and having various cell organelles constitute … [ CET Chd.1997]
  • a) Monera
  • b) Protista
  • c) Animalia
  • d) Plantae
Q.40
Assertion: Escherichia coli, Shigella sp. And Salmonella sp. Are all responsible for diarrhoeal diseases. Reason : Dehydration is common to all types of diarrhoeal diseases and adequate supply of fluids and electrolytes should be ensured … [ AIIMS 2006]
  • a) If both the assertion and reason are true and reason explains the assertion.
  • b) If both the assertion and reason are true but reason does not explain the assertion
  • c) If assertion is true but reason is false
  • d) If assertion is false but reason is true.
Q.41
An organism with non-cellulosic cell wall and autotrophic nutrition would belong to … [ BHU 2012]
  • a) Monera
  • b) Protista
  • c) Animalia
  • d) Fungi
Q.42
Which one is not true of bacterial cell wall?
  • a) Not antigenic
  • b) Provides shape to bacterium
  • c) Not stainable with simple dyes
  • d) Made of mucopeptide
Q.43
It causes abortion …
  • a) Viruses
  • b)Bacteria
  • c) Mycoplasma
  • d) Chlamydia
Q.44
Genetic material of influenza virus is … [ CBSE 1996]
  • a) Single helix DNA
  • b) Double helix DNA
  • c) Double strand RNA
  • d) Single strand RNA
Q.45
A bacterium becomes resistant to antibiotic except by … [ Odisha 2003]
  • a) Making enzyme for drug degradation
  • b) Developing impermeability to drug
  • c) Modification of drug
  • d) Moving away from drug
Q.46
Transduction was discovered in bacteria by … [ BHU 2008]
  • a) Lederberg and Tatum
  • b) Zinder and Lederberg
  • c) Wallace and Jacob
  • d) Herelle and Twort
Q.47
T2 has … .. [ AFMC 1997]
  • a) ds DNS
  • b) ss RNA
  • c) ds RNA
  • d) ss DNA
Q.48
Helical contractile sheath occurs in … .. [ AMU 1997]
  • a) Bacteria
  • b) Bacteriophage
  • c) Riboviruses
  • d) Fungi
Q.49
A non-legume, symbiotic nitrogen fixing bacterium is … [ BHU 2000]
  • a) Rhizobium
  • b) Azotobacter
  • c) Frankia
  • d) Clostridium
Q.50
F-factor occurs in …. [ Odisha 2006]
  • a) Plasmid
  • b) Cosmid
  • c) Golgi body
  • d) Cell wall
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