Q.1
In viruses, the nucleic acid is … .. [ MPPMY 1991 ]
  • a) DNA
  • b) RNA
  • c) Both A or B
  • d) Either A or B
Q.2
Diphtheria is due to … [ AIIMS 2007]
  • a) Poison released by living bacteria
  • b) Poison released by dead bacteria
  • c) Poison released by virus
  • d) Excessive immune response
Q.3
Bacteriophages kill … .. [ BHU 1993]
  • a) Fungi
  • b) All monerans
  • c) Bacteria
  • d) Viruses
Q.4
Smallest organisms capable of growth, division and reproduction are… ..[ BHU 1997]
  • a) Bacteria
  • b) Viruses
  • c) Mycoplasma
  • d) Actinomycetes
Q.5
Which of the following is false? [ CPMT 2005]
  • a) Most plant viruses are RNA viruses
  • b) Most animal viruses are DNA viruses
  • c) TMV has a doubled stranded RNA
  • d) T4 bacteriophage has double stranded DNA molecule
Q.6
Nitrosomonas is a … .. [ MPPMT 1991]
  • a) Photoautotroph
  • b) Chemoautotroph
  • c) Chemoheterotroph
  • d) Photohetrotroph
Q.7
Whittaker proposed 5-kingdome classification in …. .. [ AMU 2001]
  • a) 1969
  • b) 1959
  • c) 1978
  • d) 1988
Q.8
A bacterium is capable of withstanding extreme heat, dryness and toxic chemicals. This indicates that it is probably able to form … [ KCET 2009]
  • a) A thick peptidoglycan wall
  • b) Endospores
  • c) Endotoxins
  • d) Endogenous buds
Q.9
Monerans devoid of cell wall are … [ CPMT 2000]
  • a) Bacteria
  • b) Cyanobacteria
  • c) Mycoplasma
  • d) Actinomycetes
Q.10
Smallest bacterium is ….. [ CPMT 2002]
  • a) Dialister
  • b) Nitrosomonas
  • c) Bacillus
  • d) Spirillum
Q.11
Gram negative bacteria detect and respond to chemicals by … [ kerala 2003]
  • a) Muramic acid
  • b) Lipopolysaccharide
  • c) Porins
  • d) Volutin granules
Q.12
Bacterial protoplasm is granular due to .. .. [ BHU 1997]
  • a) Golgisomes
  • b) Lysosomes
  • c) Ribosomes
  • d) Endoplasmic reticulum
Q.13
Which institute is correctly matched with its location … .. [ AIIMS 2008]
  • a) National institute of communicable diseases → Lucknow
  • b) National Institute of Virology → Pune
  • c) National institute of Nutrition → Mumbai
  • d) Central Drug Research institute → Kasauli
Q.14
Plasmid is … [ Odisha 2003]
  • a) Single stranded DNA
  • b) Double stranded circular DNA
  • c) Extrachromosomal linear DNA
  • d) RNA
Q.15
Iron bacterium is … .. [ MPPMT1999]
  • a) Beggiatoa
  • b) Geobacillus
  • c) Thiobacillus
  • d) None of the above
Q.16
Trachoma is caused by .. .. [ CET Chd 2003]
  • a) Spirochaete
  • b) Chlamydia
  • c) Trichonympha
  • d) Paramaecium
Q.17
Phylogenetic system of classification was proposed by … .. [ BHU 91]
  • a) Hutchinson/ Engler and Prantl
  • b) Bentham and Hooker
  • c) Linnaeus
  • d) Santapau
Q.18
Plasmids are extrachromosomal genetic materials of … [ CPMT 2009]
  • a) Virus
  • b) Bacteria
  • c) Algae
  • d) Amoeba
Q.19
Bacteria are examples of .. [ Odisha 2009]
  • a) Protistan cell
  • b) Eukaryotic cell
  • c) Animal cells
  • d) Prokaryotic cells
Q.20
Xanthomonas citri contains …
  • a) Single polar flagellum
  • b) Bipolar flagella
  • c) Tuft of flagella
  • d) No flagella
Q.21
cDNA is … .. [ Odisha 2003]
  • a) Circular DNA
  • b) Coiled DNA
  • c) Cytoplasmic DNA
  • d) Complementary DNA
Q.22
Bacteria have cell membrane made of …[ PbPMT2000]
  • a) Chitin
  • b) Cellulose
  • c) Proteins and phospholipids
  • d) Fats
Q.23
Streptococcus is used in preparation of … [ DPMT 2003]
  • a) Wine
  • b) Idli
  • c) Cheese
  • d) Bread
Q.24
Harmful substances released by bacteria are … [ AFMC 2003]
  • a) Antibiotic
  • b) Toxins
  • c) Antigens
  • d) Allergens
Q.25
Largest known virus is … .. [ JIPMER 1998]
  • a) TMV
  • b) T1 phage
  • c) Citrus tristeza
  • d) Φ ×174
Q.26
Which is not correct about antibiotics? … [ CBSE 1996]
  • a) Fleming discovered the first commercial antibiotic
  • b) Waksman coined the term antibiotic in 1942
  • c) Allergy may develop against an antibiotic
  • d) An antibiotic is effective against one specific pathogen
Q.27
The scientist who created the group Protista for both unicellular plants and animals is … .. [ AIIMS 1993]
  • a) Haeckel
  • b) Pasteur
  • c) Lister
  • d) Koch
Q.28
Which one is bacterial disease? [ Pb PMT 1997]
  • a) Rust of Tea
  • b) Red rot of Sugarcane
  • c) Citrus canker
  • d) Late blight of Potato
Q.29
Gram (-)ve bacteria possess peptidoglycan and an extra layer of …. [AIIMS 2001]
  • a) Protein
  • b) Lipoprotein
  • c) Lipopolysaccharide
  • d) Lipid
Q.30
Which one is a prokaryotic? … [ MPPMT 2007]
  • a) Oscillatoria/bacteria
  • b) Chlamydomonas
  • c) Volvox
  • d) Chlorella
Q.31
Maximum number of bases in plasmids in … .. [ CBSE 2001]
  • a) 50 kilobase
  • b) 500 kilobase
  • c) 5000 kilobase
  • d) 50,000 kilobase
Q.32
BGA are included amongst … .. [ CBSE 1996]
  • a) Prokaryotes
  • b) Fungi
  • c) Bryophytes
  • d) Protista
Q.33
Which of the following diseases is not caused by virus … .. [ HPPMT 2010]
  • a) Mumps
  • b)AIDS
  • c) Tuberculosis
  • d) Rabies
Q.34
Assertion: Plasmids are single stranded extra chromosomal DNA. Reason : Plasmids are possessed by eukaryotic cells
  • 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 both the assertion and reason false
Q.35
TMV possesses … . [ MPPMT 2001]
  • a) DNA
  • b) DNA + protein
  • c) RNA + Protein
  • d) DNA + RNA
Q.36
Fraenkel-Conrat demonstrated that RNA is genetic material in …
  • a) HIV
  • b) CMV
  • c) TMV
  • d) Mouse Sarcoma
Q.37
Mitochondria probably originated from bacteria because both have … .. [ AIIMS 1994]
  • a) Similar type of circular DNA
  • b) Similar pigments
  • c) Same function
  • d) All the above
Q.38
Genes are packed in bacterial chromosome by … .. [ CBSE 1997]
  • a) Acid proteins
  • b) Histones
  • c) Basic proteins
  • d) Actin
Q.39
Which one of the following can fix nitrogen? … … [ BHU 1991]
  • a) Vaucheria
  • b) Spirogyra
  • c) Nostoc
  • d) Ectocarpus
Q.40
Bacteria useful in biogas fermentation are …. [ kerala 2002]
  • a) Methanogens
  • b) Halophiles
  • c) Vibrio
  • d) Thermoacidophiles
Q.41
Mycoplasma is … [ JIPMER 2002]
  • a) Unicellular eukaryote
  • b) Unicellular prokaryote
  • c) Multicellular prokaryote
  • d) Multicellular eukaryote
Q.42
Bacteria which convert atmospheric nitrogen into nitrogen compounds are called … [ AFMC 1996]
  • a) Nitrogen fixing bacteria
  • b) Nitrifying bacteria
  • c) Putrefying bacteria
  • d) Denitrifying bacteria
Q.43
Bacteria differ from viruses in … .. [ CPMT 1993]
  • a) Pathogenic nature
  • b) Genetic material
  • c) Having well defined cytoplasm
  • d) Lacking proper nucleus
Q.44
Transfer of genetic material with the help of virus is called … [ BHU 1991]
  • a) Transference
  • b) Transformation
  • c) Transduction
  • d) Transcription
Q.45
Escherichia coli present in human colon is …. ..[ AFMC 2002]
  • a) Parasite
  • b) Commensal
  • c) Symbiont
  • d) Saprophyte
Q.46
The most well studied bacterial-plant relationship is that of … [ CBSE 2004]
  • a) Cyanobacterial symbiosis with some aquatic ferns
  • b) Nodulation in sesbania stem
  • c) Gall formation by Agrobacterium
  • d) Growth stimulation by phosphate bacteria
Q.47
Mitochondria probably originated from bacteria because both have … .. [ AIIMS 1994]
  • a) Similar type of circular DNA
  • b) Similar pigments
  • c) Same function
  • d) All the above
Q.48
Spirulina is a … [ CPMT 2010]
  • a) Fungus
  • b) Blue green alga
  • c) Pteridophyte
  • d) Bryophyte
Q.49
Which one is peritrichous? [ MPPMT 2002]
  • a) Pseudomonas
  • b) Bacillus typhosus
  • c) Spirillum
  • d) Vibrio
Q.50
In bacteria plasmid is … [ CBSE 2002]
  • a) Extrachromosomal material
  • b) Main DNA
  • c) Non-functional DNA
  • d) Repetitive gene
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