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Microbes in Human Welfare BIOLOGY - Microbes in Human Welfare

Gujarat Board (GSEB) - STD 12 Science - BIOLOGY (GSEB - English Medium). 91 questions in this chapter.

Question types

Microbes in Human Welfare question types

91 questions across 6 question groups — pick any mix to generate a BIOLOGY paper with step-by-step answer keys.

91
Questions
6
Question groups
5
Question types
Sample Questions

Microbes in Human Welfare questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
Citric acid is produced by which of the following micro$-$organisms
  • A
    Acetobacter aceti
  • B
    Clostridium butylicum
  • C
    Lactobacillus species
  • ✓
    Aspergillus niger

Answer: D.

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Q 3M.C.Q (1 Marks)1 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: C.

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Q 4M.C.Q (1 Marks)1 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: B.

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Q 5M.C.Q (1 Marks)1 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: A.

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Q 81 Marks Question1 Mark
(i) Write the name of one such genus of fungus which establishes mycorrhizae relationship with plants.
(ii) How do the plants get benefitted from this relation?
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Q 101 Marks Question1 Mark
In order to improve soil fertility, farmers are often advised to add the following microbes to the fields. Explain.
(a) Rhizobium (b) Anabaena
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