Biofertilizers And Antibiotics Test

Biofertilizers And Antibiotics

This is online test 03 for CBSE class 12 Biology Microbes in Human Welfare (Biofertilizers and antibiotics).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Green manure plants used by farmer mainly belong to
  • A
    Poaceae
  • B
    Leguminosae
    Correct
  • C
    Solanaceae
  • D
    Compositae
2
A patient brought to a hospital with myocardial infarction is normally immediately given
  • A
    Cyclosporin–A
  • B
    Statins
  • C
    Streptokinase
    Correct
  • D
    Penicillin
3
Azolla is used as a biofertilizers because it
  • A
    Has association of mycorrhiza
  • B
    Has association of nitrogen fixing Rhizobium
  • C
    Multiplies very fast to produce massive
  • D
    Has association of nitrogen fixing Cyanobacteria
    Correct
4
Which of the following infectious disease cannot be controlled by antibiotics
  • A
    Common cold
    Correct
  • B
    Diphtheria
  • C
    Pneumonia
  • D
    Whooping cough
5
Morphine, which is used as an analgesic is obtained from
  • A
    Berberis nilghiriensis
  • B
    Cinchona officinalis
  • C
    Papaver somniferum
    Correct
  • D
    Taxus brevifolia
6
Baculoviruses are pathogens that
  • A
    Attacks birds and snail
  • B
    Kills useful insects in the field
  • C
    Attack insects and other arthropods
    Correct
  • D
    Promote insects and arthropods
7
Assertion: Biofertilizers are organisms that enrich the nutrient quality of soil. Reason: Organic farming is the farming technique in which no chemical is used as fertilizers or insecticides.
  • A
    Both assertion and reason are correct but reason is not explanation of assertion
    Correct
  • B
    Assertion is correct but reason is incorrect
  • C
    Both assertion and reason are incorrect
  • D
    Assertion is incorrect but reason is correct
8
The main source of bio-fertilizers are
  • A
    Only cyanobacteria
  • B
    Only fungi
  • C
    Only bacteria
  • D
    Bacteria, fungi and cyanobacteria
    Correct
9
Assertion: Many members of genus Glumus forms symbiotic association with plants (mycorrhiza). Reason: Fungal symbionts in these associations absorb nitrogen from the soil and pass it to the plants.
  • A
    Assertion is incorrect but reason is correct
  • B
    Both assertion and reason are correct
  • C
    Assertion is correct but reason is incorrect
    Correct
  • D
    Both assertion and reason are incorrect
10
In which of the following microbes are not used extensively? a. Converting milk into curd. b. Making cheese of different flavor and taste. c. Production of viral drugs. d. Production of antibiotics. e. As bio-fertilizers. f. Production of inorganic fertilizers
  • A
    Only ‘b’ and ‘c’
  • B
    Only ‘a’ and ‘b’
  • C
    Only ‘c’ and ‘d’
  • D
    Only ‘c’ and ‘f’
    Correct