CBSE Multiple Choice Questions and Answers of Biology from Chapter Microbes in Human Welfare | CBSE - Microbes in Human Welfare MCQs | NCERT Solution of Class 12 Biology Microbes in Human Welfare

Questions

46 Which of the following is not used as a biopesticide?

1 Trichoderma harzianum

2 Bacillus thuringiensis

3 Xanthomonas campestris

4 Nuclear Polyhedrosis Virus (NPV)

Answer: Xanthomonas campestris

47 Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

1 Clostridium butylicum - lactic acid

2 Aspergillus niger - citric acid

3 Yeast – statins

4 Acetobacter aceti - acetic acid

View Answer

Answer: Clostridium butylicum - lactic acid

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48 Which one of the following plant is commonly used as green manure ?

1 Cassia fistula

2 Acacia nilotica

3 Dalbergia sissoo

4 Crotalaria juncea

View Answer

Answer: Crotalaria juncea

49 Cyanobacteria serves as important biofertilizers in the fields of

1 Rice

2 Maize

3 Wheat

4 Sugar cane

View Answer

Answer: Wheat

50 Which of the following is wrongly matched?

1 Aloe – Medicine

2 Petunia – Fumigatory

3 Sesbania – Fodder

4 Asparagus – Vegetable

View Answer

Answer: Petunia – Fumigatory

51 Antibiotics mostly obtained from

1 algae

2 fungi

3 actinomycetes

4 both b and c

View Answer

Answer: both b and c

52 Method of controlling pest that relies on natural predation rather than introduced chemical

1 Predation

2 Chemical control

3 Biological control

4 None of these

View Answer

Answer: Biological control

53 . ----- serves as an important biofertlizer in paddy field

1 Cyanobacteria

2 Clostridium

3 Mycorrhiza

4 Frankia

View Answer

Answer: Cyanobacteria

54 Biogas can be good substitute for

1 fuel wood

2 coal

3 charcol

4 oil and petrol

View Answer

Answer: fuel wood

55 Which of the following is a gram-negative bacterium?

1 Escherichia coli

2 Bacillus subtilis

3 Streptomyces coelicolor

4 Amycolatopsis orientalis

View Answer

Answer: Escherichia coli

56 Organism like Escherichia coli and Chlamydia trachomatis fall into which domain?

1 Eukarya

2 Archaea

3 Bacteria

4 Animalia

View Answer

Answer: Bacteria

57 From which microorganism streptomycin is prepared?

1 Sterptomyces ramous

2 Sterptomyces antibiotics

3 Sterptomyces nodosus

4 Sterptomyces griseus

View Answer

Answer: Sterptomyces griseus

58 The bacteria that grow on milk and convert it to curd

1 Clostridium

2 Lactobacillus

3 Nitosomonas

4 Acetobacter

View Answer

Answer: Lactobacillus

59 The microbe that used in control of oil spills

1 Methanobacterium

2 Rhizobium

3 Pseudomonas putida

4 Bacillus thuringiensis

View Answer

Answer: Pseudomonas putida

60 The free living fungus used as a biological control against several fungal pathogen of plants

1 Trichoderma

2 Pencillium

3 Frankia

4 Saccharomyces

View Answer

Answer: Trichoderma

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