Questions

M.C.Q (1 Marks)

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33 questions · timed · auto-graded

MCQ 11 Mark
Citric acid is produced by which of the following micro$-$organisms
  • A
    Acetobacter aceti
  • B
    Clostridium butylicum
  • C
    Lactobacillus species
  • Aspergillus niger
Answer
Correct option: D.
Aspergillus niger
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MCQ 21 Mark
Microbe, which is used as bio$-$fertilizer, is:
  • A
    Trichoderma
  • B
    Penicillium notatum
  • Cyanobacteria
  • D
    Lactobacillus
Answer
Correct option: C.
Cyanobacteria
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MCQ 31 Mark
From which microbe was the first recombinant $\text{DNA}$ produced by using a plasmid?
  • A
    $E.$ coli
  • B
    Agrobacterium tumefaciens
  • Salmonella Typhimuriam
  • D
    Thermus aquaticus
Answer
Correct option: C.
Salmonella Typhimuriam
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MCQ 41 Mark
During anaerobic digestion of organic waste as happens in making biogas, which of the following fractions doesn't decomposed?
  • A
    Lipid
  • Lignin
  • C
    Hemicellulose
  • D
    Cellulose
Answer
Correct option: B.
Lignin
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MCQ 51 Mark
Which of the following pairs is not matched correctly?
  • Citrrhotia $\rightarrow$ Drug addiction
  • B
    Spirulina $\rightarrow$ Single cell protein
  • C
    Rhizobium $\rightarrow$ Bio$-$fertilizer
  • D
    Streptomyces $\rightarrow$ Antibiotic
Answer
Correct option: A.
Citrrhotia $\rightarrow$ Drug addiction
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MCQ 61 Mark
Which of the following pairs belongs to biofertilizers?
  • Azolla and $\text{BGA}$
  • B
    Nostoc and Legame
  • C
    Rhizobium and Grass
  • D
    Salmonella and $E.$ coli
Answer
Correct option: A.
Azolla and $\text{BGA}$
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MCQ 71 Mark
Which of the following is an example of biological control of pests/diseases using microbes?
  • Trichoderma is responsible for certain plant pathogens.
  • B
    Presence of Nucleopolyhedrovirus against rot in brassica.
  • C
    Making of Bt cotton to increase the yield of cotton.
  • D
    Presence of lady bird, beetle against pests in
    mustard.
Answer
Correct option: A.
Trichoderma is responsible for certain plant pathogens.
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MCQ 81 Mark
What is usually given immediately when a patient of myocardial infarction is brought to the hospital?
  • A
    Penicillin
  • B
    Steptokinase
  • C
    Cyclosporine
  • Statins
Answer
Correct option: D.
Statins
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MCQ 91 Mark
Which is the most commonly used substrate in distilleries for the production of ethanol?
  • A
    Corn flour
  • B
    Soyabean flour
  • C
    Gram flour
  • Molasses
Answer
Correct option: D.
Molasses
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MCQ 101 Mark
In 'fed batch' fermentation method, the process of continuously adding sugar is done for which of one of the followings?
  • A
    In preparing methane
  • In obtaining antibiotics
  • C
    In purification of enzymes
  • D
    In sewage decomposition
Answer
Correct option: B.
In obtaining antibiotics
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MCQ 111 Mark
What is mainly formed by the action of anaerobic bacteria on sewage?
  • A
    Laughing gas
  • Propane
  • C
    Mustard gas
  • D
    Mars gas
Answer
Correct option: B.
Propane
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MCQ 121 Mark
What is secondary sewage treatment mainly?
  • A
    Physical Process
  • B
    Mechanical Process
  • C
    Chemical Process
  • Biological Process
Answer
Correct option: D.
Biological Process
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MCQ 131 Mark
Mycorrhiza is responsible for the nutrition of which element?
  • A
    Potassium
  • B
    Copper
  • C
    Zinc
  • Phosphorus
Answer
Correct option: D.
Phosphorus
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MCQ 141 Mark
Antibiotics play an important role in the prevention of which infectious diseases?
  • A
    Diptheria
  • B
    Whooping cough
  • C
    Leprosy
  • All of these
Answer
Correct option: D.
All of these
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MCQ 151 Mark
To grow microbes on a commercial scale, a large vessel is required, which is known as:
  • Fermenter
  • B
    Thermenter
  • C
    Ermenter
  • D
    Peermenter
Answer
Correct option: A.
Fermenter
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MCQ 161 Mark
Which of the following plans was launched so that the main rivers of the country can be prevent from pollution?
  • A
    Yamuna Action Plan
  • B
    Ganga Action Plan
  • C
    Sambhar Lake Action Plan
  • (a) and (b) both
Answer
Correct option: D.
(a) and (b) both
(D)(a) and (b) both
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MCQ 171 Mark
Which of the following bacteria is helpful in the production of acetic acid?
  • Lactobacillus
  • B
    Clostridium
  • C
    Acitobactor acetae
  • D
    Penicillium notatum
Answer
Correct option: A.
Lactobacillus
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MCQ 181 Mark
The discoverer of penicillin is:
  • A
    Alexander Hook
  • Alexander Fleming
  • C
    Alexander Brown
  • D
    Alexander Schwann
Answer
Correct option: B.
Alexander Fleming
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MCQ 191 Mark
Which of the following is prepared by distillation of fermented juice?
  • Rum
  • B
    Beer
  • C
    Wine
  • D
    All of these
Answer
Correct option: A.
Rum
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MCQ 201 Mark
Which of the following is produced without distillation?
  • Wine
  • B
    Whistkey
  • C
    Brandi
  • D
    Rum
Answer
Correct option: A.
Wine
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MCQ 211 Mark
Which pesticide is lipophilic?
  • Organochlorine
  • B
    Organophosphate
  • C
    Triazine
  • D
    Pyrethoid
Answer
Correct option: A.
Organochlorine
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MCQ 221 Mark
Toddy is prepared by fermenting the secretion obtained from which part of the palm tree?
  • A
    Root
  • B
    Leaf
  • Stem
  • D
    Flower
Answer
Correct option: C.
Stem
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MCQ 231 Mark
Which of the following is beneficial in getting rid of aphids and mosquitos?
  • Dragonfly and Ladybird
  • B
    Baculoviruses
  • C
    Bacillus thuringiensis
  • D
    Trichoderma
Answer
Correct option: A.
Dragonfly and Ladybird
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MCQ 241 Mark
Based on nutrition cyanobacteria are:
  • A
    Parasite
  • B
    Host
  • Autotrophic
  • D
    Saprophytes
Answer
Correct option: C.
Autotrophic
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MCQ 251 Mark
Which of the following is used as 'clot breaker'?
  • Streptokinase
  • B
    Lipase
  • C
    Amylase
  • D
    Proteases
Answer
Correct option: A.
Streptokinase
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MCQ 261 Mark
The rate of uptake of O, by microbes in a sample of water is measured by:
  • A
    C.O.D. Test
  • B
    H.O.D. Test
  • C
    S.O.D. Test
  • B.O.D. Test
Answer
Correct option: D.
B.O.D. Test
(D)B.O.D. Test
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MCQ 271 Mark
Which of the following is used in the control of butterfly caterpillars?
  • Bacillus thuringiensis
  • B
    Trichoderma
  • C
    Bambulovirus
  • D
    Methano bacteria
Answer
Correct option: A.
Bacillus thuringiensis
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MCQ 281 Mark
The symbiotic relationship between fungi and plants is called:
  • Mycorrhiza
  • B
    Lichen
  • C
    Symbiosis
  • D
    All of these
Answer
Correct option: A.
Mycorrhiza
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MCQ 301 Mark
Which one of the following pairs is wrongly matched?
  • Coliform$-$Vinegar
  • B
    Methanogens$-$Gobar gas
  • C
    Yeast Ethanol
  • D
    Streptomycetes$-$Antibiotic
Answer
Correct option: A.
Coliform$-$Vinegar
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MCQ 311 Mark
Which of the following pair is bio$-$fertilizers?
  • Azolla and $\text{BGA}$
  • B
    Nostoc and Legume
  • C
    Rhizobium habitat
  • D
    Salmonella and $E.$ coli
Answer
Correct option: A.
Azolla and $\text{BGA}$
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MCQ 321 Mark
While making bread, due to whose action $CO _2$ is released which causes it to become porous?
  • Yeast
  • B
    Bacteria
  • C
    Virus
  • D
    Protozoans
Answer
Correct option: A.
Yeast
(A)Yeast
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MCQ 331 Mark
The bacteria used in 'gobar gas' plant is:
  • Methanogen bacteria
  • B
    Nitrifying bacteria
  • C
    Amino acid bacteria
  • D
    Denitrifying bacteria
Answer
Correct option: A.
Methanogen bacteria
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M.C.Q (1 Marks) - Biology STD 12 Science Questions - Vidyadip