-
question_answer1)
The Streptococcus lactis is responsible for [CMC Vellore 1993]
A)
Conversion of milk into curd done
clear
B)
Conversion of molasses into alcohol done
clear
C)
Tanning of leather done
clear
D)
Flavouring the leaves of tea and tobacco done
clear
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question_answer2)
A free living anaerobic bacterium capable of \[{{N}_{2}}\] fixation in soil is [DPMT 1989, 93; CBSE PMT 1990; CMC Vellore 1993; RPMT 1995; MP PMT 1996]
A)
Rhizobium done
clear
B)
Azotobacter done
clear
C)
Streptococcus done
clear
D)
Clostridium done
clear
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question_answer3)
Which of the following is free-living aerobic non- photosynthetic nitrogen fixing bacterium [CBSE PMT 1997; BHU 2003]
A)
Rhizobium done
clear
B)
Azotobacter done
clear
C)
Nostoc done
clear
D)
Azospirillum done
clear
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question_answer4)
Which of the following groups of plants are highly useful in increasing soil fertility [CBSE PMT 1993]
A)
Red algae done
clear
B)
Fungi done
clear
C)
Bacteria done
clear
D)
Bryophytes done
clear
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question_answer5)
For the production of which of the following, the activity of the fungus or micro-organisms is not required [MP PMT 1991]
A)
Casein done
clear
B)
Panir (Cheese) done
clear
C)
Curd done
clear
D)
Wine done
clear
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question_answer6)
Root nodules contain [DPMT 1993]
A)
Nostoc done
clear
B)
Chlorobium done
clear
C)
Rhizobium done
clear
D)
Azotobacter done
clear
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question_answer7)
Antibiotics are mostly obtained from [CPMT 1971, 77, 79; JIPMER 1987]
A)
Bacteria (Actinomycetes) done
clear
B)
Virus done
clear
C)
Angiosperms done
clear
D)
Fungi done
clear
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question_answer8)
The symbiotic nitrogen fixing bacteria present in root nodules of legumes belongs to genus [DPMT 1982; MP PMT 1989; DPMT 1993; CPMT 1998; CBSE PMT 1999; Pb. PMT 1999; BVP 2002; Kerala CET 2003; MHCET 2004]
A)
Xanthomonas done
clear
B)
Pseudomonas done
clear
C)
Rhizobium done
clear
D)
Acetobacter done
clear
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question_answer9)
Nitrogen fixing bacteria are associated with [EAMCET 1981; MP PMT 1988]
A)
Leguminasae done
clear
B)
Cruciferae done
clear
C)
Gramineae done
clear
D)
Malvaceae done
clear
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question_answer10)
Which of the following is recently discovered gram positive non-leguminous nitrogen fixing bacterium [BHU 1981; AIEEE 2003]
A)
Azospirillum done
clear
B)
Rhizobium done
clear
C)
Nitrosomonas done
clear
D)
Spirillum done
clear
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question_answer11)
Nitrifying bacteria, Nitrosomonas and Nitrobactor [AFMC 1981, 84; CPMT 1983, 86; BHU 1985]
A)
Convert (oxidise) ammonia or ammonium compounds into nitrates done
clear
B)
Convert nitrate into nitrogen done
clear
C)
Convert nitrogen into nitrates done
clear
D)
Convert carbon dioxide into carbohydrates done
clear
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question_answer12)
Clostridium is an example of [BHU 1984]
A)
Obligate aerobic nitrogen fixing bacteria done
clear
B)
Facultative nitrogen fixing bacteria done
clear
C)
Non nitrogen fixing bacteria done
clear
D)
Aerobic nitrogen fixing bacteria done
clear
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question_answer13)
Retting of fibres is caused by [JIPMER 1987]
A)
Bacillus done
clear
B)
Clostridium done
clear
C)
Nitrobacter done
clear
D)
Rhizobium done
clear
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question_answer14)
Which of the bacterium cause the fermentation of milk and other plant products
A)
Lactobacillus done
clear
B)
Hay bacillus done
clear
C)
Acetobacter done
clear
D)
Rhizobium done
clear
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question_answer15)
Bacteria which convert the nitrogen of the air to nitrogenous compounds are called [CPMT 1974]
A)
Nitrifying done
clear
B)
Nitrogen fixing done
clear
C)
Denitrifying done
clear
D)
Putrefying done
clear
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question_answer16)
Which of the following decompose the remanents of the plants into \[C{{O}_{2}}\] and water
A)
Algae done
clear
B)
Sunlight done
clear
C)
Virus done
clear
D)
Bacteria done
clear
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question_answer17)
What is the cause of flavour of tea and tobacco leaves
A)
Mechanical method done
clear
B)
Different strains of bacteria done
clear
C)
Activity of fungi done
clear
D)
Action of viruses done
clear
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question_answer18)
Sugary solution is changed to vinegar by the action of
A)
Azotobacter done
clear
B)
Diplococcus done
clear
C)
Bacillus subtilis done
clear
D)
Mycoderma aciti done
clear
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question_answer19)
Tetanolysin is produced by
A)
Mycobacterium laprae done
clear
B)
Clostridium botulinum done
clear
C)
Clostridium tetani done
clear
D)
None of these done
clear
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question_answer20)
Which of the following red pigment is present in root nodules of bacteria
A)
Phycoerythrin done
clear
B)
Bacterio chlorophyll done
clear
C)
Leg haemoglobin done
clear
D)
Bacterio viridin done
clear
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question_answer21)
Which of the following processes is performed only by bacteria
A)
Ripening of cheese done
clear
B)
Synthesis of antibiotics done
clear
C)
Humus formation done
clear
D)
Formation of vitamin 'K' in the intestine done
clear
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question_answer22)
Human symbiotic bacteria help in
A)
Intake of meals done
clear
B)
Digestion of meals done
clear
C)
Excretion of digested meal done
clear
D)
None of the above done
clear
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question_answer23)
Bacillus megatherium is used in
A)
Food poisoning done
clear
B)
Food processing done
clear
C)
Food manufacturing done
clear
D)
None of the above done
clear
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question_answer24)
Micro-organisms are used in
A)
Sewage disposal done
clear
B)
Biological control of diseases done
clear
C)
Biological warfare done
clear
D)
All the above done
clear
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question_answer25)
The denitrification means [DPMT 1990; CPMT 2003]
A)
Reduction of \[N{{O}_{2}}\] to ammonia form by bacteria in the soil done
clear
B)
Oxidation of ammonia to nitrate form done
clear
C)
Conversion of ammonia to amino acids done
clear
D)
Conversion of ammonia and nitrates to gaseous nitrogen in the soil done
clear
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question_answer26)
Waksman got the Nobel Prize for the discovery of [DPMT 1992]
A)
Penicillin done
clear
B)
Streptomycin done
clear
C)
Chloromycetin done
clear
D)
Neomycin done
clear
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question_answer27)
A compound which is produced by an organism and inhibits the growth of other organism is called [DPMT 1992]
A)
Antiseptic done
clear
B)
Anticoagulant done
clear
C)
Antibiotic done
clear
D)
Anti-allergic done
clear
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question_answer28)
The decomposition of organic compounds in the presence of \[{{O}_{2}}\] without the development of odoriferous substance is
A)
Nitrifixation done
clear
B)
Decay done
clear
C)
Denitrifixation done
clear
D)
Nitrogen fixation done
clear
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question_answer29)
The chemotherapeutic substance derived from living organism that has an inhibitory effect on parasitic organism is known as
A)
Exotoxin done
clear
B)
Bactericide done
clear
C)
Antibody done
clear
D)
Antibiotic done
clear
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question_answer30)
The bacterial decomposition of nitrogenous organic compounds in the absence of abundant oxygen usually results in the formation of substance of offensive odour, chiefly sulphur compounds. Such anaerobic decomposition is called
A)
Putrefaction done
clear
B)
Nitrification done
clear
C)
Denitrification done
clear
D)
N2 fixation done
clear
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question_answer31)
A suspension of killed or attenuated bacteria useful for artificial immunization is
A)
Bacteriocin done
clear
B)
Bacteriolysin done
clear
C)
Bacterin done
clear
D)
Barophile done
clear
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question_answer32)
The main role of bacteria in the carbon cycle involves [CBSE PMT 1998; AIIMS 2000]
A)
Photosynthesis done
clear
B)
Assimilation of nitrogenous compounds done
clear
C)
Chemosynthesis done
clear
D)
Digestion or breakdown of organic compounds done
clear
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question_answer33)
Wine turns sour because of [CPMT 1994]
A)
Heat done
clear
B)
Aerobic bacteria done
clear
C)
Anaerobic bacteria done
clear
D)
Exposure to light done
clear
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question_answer34)
The bacteria which convert \[N{{O}_{3}}\to \] Free \[{{N}_{2}}\] are called as [CPMT 1994, 2003; MP PMT 1996; MHCET 2003]
A)
Nitrifying bacteria done
clear
B)
Ammonifying bacteria done
clear
C)
Denitrifying bacteria done
clear
D)
None of these done
clear
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question_answer35)
A large number of organic compounds can be decomposed by [CBSE PMT 1995]
A)
Chemoorgano done
clear
B)
Pseudomonas done
clear
C)
Acetobacter done
clear
D)
Mycoplasma done
clear
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question_answer36)
Which one of the following bacteria has potential for nitrogen fixation [MP PMT 1995; Bihar MDAT 1995]
A)
Nitrosomonas done
clear
B)
Nitrobacter done
clear
C)
Nitrosococcus done
clear
D)
Rhizobium done
clear
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question_answer37)
The biological process carried on by Rhizobium is called [MP PMT 1995]
A)
Nitrification done
clear
B)
Ammonification done
clear
C)
Nitrogen fixation done
clear
D)
Fermentation done
clear
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question_answer38)
Nitrifying bacteria are those which can convert [MP PMT 1995]
A)
Atmospheric nitrogen into ammonia done
clear
B)
Ammonia into nitrites done
clear
C)
Nitrites into nitrates done
clear
D)
Nitrates into ammonia done
clear
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question_answer39)
Root nodules for nitrogen fixation in nonleguminous trees are produced by species of the genus [BHU 1994]
A)
Rhizobium done
clear
B)
Azatobacter done
clear
C)
Frankea done
clear
D)
Thiobacillus done
clear
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question_answer40)
Bacteria which directly convert atmospheric nitrogen into nitrogen compounds are called [AFMC 1996]
A)
Denitrifying bacteria done
clear
B)
Putrefying bacteria done
clear
C)
Nitrogen fixing bacteria done
clear
D)
Nitrifying bacteria done
clear
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question_answer41)
One of the useful activities of several bacteria is [MP PMT 1998]
A)
Nitrogen fixation done
clear
B)
Nitrification done
clear
C)
Operation of biogeochemical cycles done
clear
D)
All of the above done
clear
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question_answer42)
Which one of the following can utilize molecular nitrogen \[({{N}_{2}})\] as nutrient for growth [MP PMT 1998]
A)
Rhizobium done
clear
B)
Spirogyra done
clear
C)
Mucor done
clear
D)
Methanococcus done
clear
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question_answer43)
Which of the following is used to cure off the bitterness of tea leaves [CPMT 1999; JIPMER 2001]
A)
Bacillus subtilis done
clear
B)
B. megatherium done
clear
C)
B. lactis done
clear
D)
B. mycococcus done
clear
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question_answer44)
Which of the following soil microorganisms breaks down plant and animal protein into ammonia [KCET 1998]
A)
Bacillus vulgaris done
clear
B)
Nitrosomonas done
clear
C)
Pseudomonas done
clear
D)
None of the above done
clear
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question_answer45)
The bacteria found in nodules of family leguminoseae are [CPMT 1998]
A)
Rhizobium done
clear
B)
Azotobacter done
clear
C)
Nitrobacter done
clear
D)
None of these done
clear
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question_answer46)
Which bacteria convert ammonium salts into nitrite [CPMT 1998]
A)
Nitrobacter done
clear
B)
Nitrosomonas done
clear
C)
Azotobacter done
clear
D)
None of these done
clear
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question_answer47)
Which of the following is non-symbiotic biofertilizer [CBSE PMT 1998]
A)
VAM done
clear
B)
Azotobacter done
clear
C)
Anabaena done
clear
D)
Rhizobium done
clear
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question_answer48)
Which is not help in \[{{N}_{2}}\] fixation [RPMT 1999]
A)
Anabaena done
clear
B)
Nostoc done
clear
C)
Oscillatoria done
clear
D)
Rhizobium done
clear
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question_answer49)
Fermentation is by [RPMT 1999]
A)
All micro organism done
clear
B)
All fungi done
clear
C)
All bacteria done
clear
D)
Some fungi and some bacteria done
clear
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question_answer50)
Plasmid is used as carrier because [CBSE PMT 2000]
A)
It has antibiotic resistance genes done
clear
B)
Its both ends are replicating points done
clear
C)
It can go between eukaryotic and prokaryotic cells done
clear
D)
It is circular DNA which has capacity to bind eukaryote DNA done
clear
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question_answer51)
The bacteria (Clostridium botulinum) that cause botulism are [KCET 2001]
A)
Obligate aerobes done
clear
B)
Facultative aerobes done
clear
C)
Obligate anaerobes done
clear
D)
Facultative anaerobes done
clear
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question_answer52)
Biofertilizers include [J & K CET 2002]
A)
Nitrogen fixing bacteria done
clear
B)
Nitrogen fixing cyanobacteria done
clear
C)
Mycorrhiza done
clear
D)
All of these done
clear
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question_answer53)
Milk is changed into curd by [MP PMT 2002]
A)
Acetobactor aceti done
clear
B)
Bacillus megatherium done
clear
C)
Xanthomonas citri done
clear
D)
None of these done
clear
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question_answer54)
Which of the bacterium is useful in preparing Idli [BVP 2003]
A)
Leuconostoc mesenteroides done
clear
B)
Clostridium done
clear
C)
Both (a) and (b) done
clear
D)
None of the above done
clear
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question_answer55)
A substance that causes the disintegration of bacteria is
A)
Bacteriocin done
clear
B)
Bacterin done
clear
C)
Barophile done
clear
D)
Bacteriolysin done
clear
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question_answer56)
Which bacteria is responsible for the reduction of nitrates in to nitrogen, in soil [Orissa JEE 2005]
A)
Nitrosomonas done
clear
B)
Pseudomonas done
clear
C)
Rizobium done
clear
D)
Clostridium done
clear
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question_answer57)
For retting of jute the fermenting microbe used is [CBSE PMT 2005]
A)
Methophilic done
clear
B)
Butyric acid bacteria done
clear
C)
Helicobactor pylori done
clear
D)
Streptococcus lactin done
clear
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question_answer58)
All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia [CBSE PMT 2005]
A)
Can induce root nodules on many plant species done
clear
B)
Cannot fix nitrogen in the free-living state done
clear
C)
Cannot fix specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hapanoids done
clear
D)
Like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex done
clear
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question_answer59)
Which of the following is a free living nitrogen fixing bacteria present in the soil [J & K CET 2005]
A)
Pseudomonas done
clear
B)
Rhizobium done
clear
C)
Azotobacter done
clear
D)
Nitrosomonas done
clear
View Solution play_arrow