NCERT - Microbes in Human Welfare Questions and Answers of Class 12 Biology | GkSeries
Questions
31
Semiconservative replication of DNA was first demonstrated in
Answer: Escherichia coli
32
A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called
Answer: Activated sludg0e treatment
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33
The symbiotic association of fungi with the roots of higher plants is called:
Answer: Mycorrhiza
34
Monascus purpureus is a yeast used commercially in the production of
Answer: Blood cholesterol lowering statins
35
Bacterial leaf blight of rice is caused by a species of:
Answer: Xanthomonas
36
A symbiotic relationship/interaction in which 'one species benefits and the other species is not affected' is called:
Answer: Commensalism
38
Which of the following is added to milk to curdle it or produce fermented milk products?
Answer: Lactobacillus
41
Which of the followings is also called sac fungi that live parasitically and in various habitats?
Answer: Ascomycetes
42
Two microbes found to be very useful in genetic engineering are
Answer: Escherichia coli and Agrobacterium tumefaciens
43
The most important of the symbiotic nitrogen fixing bacteria which forms nodules on the roots of legume plants is
Answer: Rhizobium
44
Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the two groups
Answer: Eubacteria and archaea
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
