NCERT - Microbes in Human Welfare Questions and Answers of Class 12 Biology | GkSeries
Questions
1
Which of the followings is mainly produced by the activity of anaerobic bacteria on sewage?
Answer: Marsh gas
2
Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by
Answer: Using them for producing biogas.
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3
Which one of the following is used as biological insecticide?
Answer: Tiger beetle
4
Azolla is used as a biofertilizer because it
Answer: Has association of nitrogen fixing Cyanobacteria
5
A nitrogen fixing microbe associated with Azolla in rice fields is
Answer: Anabaena
6
Physical removal of large and small from the sewage through filtration and sedimentation is called:
Answer: Primary treatment
7
The yeast that is used in alcohol production and bread making is
Answer: Saccharomyces cerevisiae
8
In paddy fields biological nitrogen fixation is chiefly brought by
Answer: Cyanobacteria
9
Which of the following bacterium produces butyric acid?
Answer: Clostridium butylicum
12
Human insulin is being commercially produced from a transgenic species of
Answer: Escherichia
13
Morphine, which is used as an analgesic is obtained from
Answer: Papaver somniferum
14
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?
Answer: Glomus
Chapters
- Evolution
- Ecosystem
- Health and Diseases
- Human Reproduction
- Microbes in Human Welfare
- Molecular Basis of Inheritance
- Principles of Inheritance & Variation
- Reproduction in Flowering Plants
- Reproduction in Organisms
- Strategies for Environment & food production
- Biodiversity & Conservation
- Biotechnology & its Applications
- Biotechnology Principles & Processes
- Environmental Issues
- Organisms & Populations
