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question_answer1)
Escherichia coli has the following combination of characters [AFMC 1993]
A)
Rod shaped, \[1-3\,\mu m\] long, gram negative done
clear
B)
Rod shaped, \[1-3\,\mu m\] long, gram positive done
clear
C)
Spiral, \[1-3\,\mu m\] long, gram negative done
clear
D)
Spiral, \[1-3\,\mu m\] long, gram positive done
clear
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question_answer2)
Salmonella typhi was discovered by
A)
Leeuwenhoek done
clear
B)
Eberth done
clear
C)
Koch done
clear
D)
Lister done
clear
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question_answer3)
Magnesium ribonucleate is present in
A)
Gram negative bacteria done
clear
B)
Gram positive bacteria done
clear
C)
Both the above done
clear
D)
None of the above done
clear
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question_answer4)
\[{{K}_{12}}\] plasmid was studied first in
A)
E. coli done
clear
B)
Shigella done
clear
C)
Salmonella done
clear
D)
Eberthella done
clear
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question_answer5)
E. coli bacterium possesses a single large circular DNA as its genetic material. This strands codes for
A)
1000 to 2000 different proteins done
clear
B)
2000 to 3000 different proteins done
clear
C)
3000 to 4000 different proteins done
clear
D)
More than 4000 different proteins done
clear
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question_answer6)
Pasturella pestis measures ...... in length
A)
\[0.1\] to \[0.2\mu \] done
clear
B)
\[1\] to \[2\mu \] done
clear
C)
\[0.5\]to \[0.8\mu \] done
clear
D)
\[2\] to \[2.5\mu \] done
clear
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question_answer7)
An average weight of bacterium is about
A)
\[0.2\times {{10}^{10}}gm\] done
clear
B)
\[0.2\times {{10}^{8}}gm\] done
clear
C)
\[0.2\times {{10}^{12}}gm\] done
clear
D)
\[0.2\times {{10}^{9}}gm\] done
clear
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question_answer8)
A 1ml pipette can contain about
A)
1018 bacteria done
clear
B)
1010 bacteria done
clear
C)
106 bacteria done
clear
D)
1012 bacteria done
clear
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question_answer9)
Cell wall of Gram negative bacteria is
A)
20 to 30 mm thick done
clear
B)
10 to 15 mm thick done
clear
C)
5 to 10 mm thick done
clear
D)
15 to 20 mm thick done
clear
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question_answer10)
The gram negative bacteria detect and responsed to chemicals in their surroundings by [Kerala CET 2003]
A)
Lipopolysaccharide done
clear
B)
Muramic acid done
clear
C)
Porins done
clear
D)
Volutin granules done
clear
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question_answer11)
A few organisms are known to grow and multiply at temperatures of \[100105{}^\circ C.\] They belong to [CBSE PMT 1998]
A)
Thermophilic subaerial fungi done
clear
B)
Marine archaebacteria done
clear
C)
Thermophilic sulphur bacteria done
clear
D)
Hot spring blue-green algae done
clear
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question_answer12)
In order to label the coat alone but not the nucleic acid, the bacteriophage should be grown on E. coli cells previously cultured on a medium containing
A)
\[{{P}^{32}}\] done
clear
B)
\[{{S}^{35}}\] done
clear
C)
\[{{H}^{3}}\] done
clear
D)
\[{{C}^{14}}\] done
clear
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question_answer13)
'The integration process' in which a bacterial cell remain undestroyed and unaffected even in the presence of 'phage' is called as
A)
Plaques done
clear
B)
Virion done
clear
C)
Viroid done
clear
D)
Lysogeny done
clear
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question_answer14)
A bacterium divides every 35 minutes. If a culture containing \[{{10}^{5}}\,cells/ml\]is grown for 175 minutes. What will be the cell concentration / ml after 175 minutes [CBSE PMT 1998; BHU 2004]
A)
\[175\times {{10}^{5}}\,cells\] done
clear
B)
\[85\times {{10}^{5}}\,cells\] done
clear
C)
\[35\times {{10}^{5}}\,cells\] done
clear
D)
\[32\times {{10}^{5}}\,cells\] done
clear
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question_answer15)
Which of the following bacterium converts the sucrose into dextrin
A)
Bacillus megatherium done
clear
B)
Leuconostoc mesenteroides done
clear
C)
Clostridium botulinum done
clear
D)
None of the above done
clear
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question_answer16)
Fresh meat is putrefied by
A)
Clostridium done
clear
B)
Pseudomonas done
clear
C)
Proteus done
clear
D)
All the above done
clear
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question_answer17)
Bacillus thuriginensis is a good
A)
Biofertilizer done
clear
B)
Biopesticide done
clear
C)
Biofuel done
clear
D)
Single cell protein done
clear
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question_answer18)
Which one of the following is genetically improved bacteria for pollution control [CPMT 1998]
A)
Pseudomonas done
clear
B)
Rhizobium done
clear
C)
Nitrobacter done
clear
D)
Nitrosomonas done
clear
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question_answer19)
Coccidiomycosis is caused by
A)
Coccidiodes done
clear
B)
Cryptococcus done
clear
C)
Fusarium done
clear
D)
Curvularia done
clear
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question_answer20)
Pseudomonas cola causes
A)
Mycosis done
clear
B)
Aspergillosis done
clear
C)
Stomach pain done
clear
D)
None of the above done
clear
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question_answer21)
The most thoroughly studied of the known bacteria-plant interactions is the [CBSE PMT 2004]
A)
Nodulation of Sebania stems by nitrogen fixing bacteria done
clear
B)
Plant growth stimulation by phosphate-solubilising bacteria done
clear
C)
Cyanobacterial symbiosis with some aquatic ferns done
clear
D)
Gall formation on certain angiosperms by Agrobacterium done
clear
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question_answer22)
Mycoplasma differs from virus in being sensitive to [MP PMT 1995]
A)
Sugar done
clear
B)
Tetracycline done
clear
C)
Protein done
clear
D)
Amino acid done
clear
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question_answer23)
Vertical transmission of mycoplasmal diseases may be through
A)
Bulbs done
clear
B)
Tubers done
clear
C)
Corns done
clear
D)
All the above done
clear
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question_answer24)
Which of the following is a mycoplasmal disease
A)
Clover phyllody done
clear
B)
Stripe disease of sugarcane done
clear
C)
Yellows dwarf of tobacco done
clear
D)
All the above done
clear
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question_answer25)
Mycoplasma can be cultured on
A)
P.D.A. medium done
clear
B)
C.P.A. medium done
clear
C)
Hayflick's (modified) medium done
clear
D)
None of these done
clear
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question_answer26)
Otitis media (inflammation of middle ear) is caused by
A)
Virus done
clear
B)
Bacteria done
clear
C)
Bacteriophage done
clear
D)
Mycoplasma done
clear
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question_answer27)
Heterocyst constitutes a
A)
Weakest link in trichome done
clear
B)
Strongest link in trichome done
clear
C)
In some trichomes it is a strong link done
clear
D)
It is not linked at all done
clear
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question_answer28)
Cells of Nostoc are
A)
Moniliform done
clear
B)
Fusiform done
clear
C)
Conical done
clear
D)
None of the above done
clear
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question_answer29)
Myxoxanthophyll is found in
A)
Bacteria done
clear
B)
Cyanobacteria done
clear
C)
Mycoplasma done
clear
D)
None of these done
clear
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question_answer30)
The existence of process of transformation in cyanobacteria has been experimentally established by
A)
Kumar done
clear
B)
Ueda done
clear
C)
Doolittle done
clear
D)
Rippka done
clear
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question_answer31)
Red sea phenomena due to
A)
Red algae done
clear
B)
Dinophyceae done
clear
C)
Diatoms done
clear
D)
Blue-green algae (Trichodesmium erythrium) done
clear
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