CBSE - Microbes in Human Welfare MCQs | CBSE Solution of Class 12 Biology Microbes in Human Welfare

Questions

61 Rotenone is

1 A bioherbicide

2 A natural insecticide

3 An insect hormone

4 A natural herbicide

View Answer

Answer: A natural insecticide

62 The most common fungal partners of mycorrhiza are ______ species

1 Azotobacter

2 Glomus

3 Azolla

4 Frankia

View Answer

Answer: Glomus

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63 A hybrid where the cytoplasm of two parent cells are fused by retaining only one parental nucleus is called

1 Asymmetric somatic hybrid

2 Symmetric somatic hybrid

3 An interbreed

4 Cybrid

View Answer

Answer: Cybrid

64 Streptokinase used as a ‘clot buster’ for removing clots from blood vessels of patients who have undergone myocardial infraction infection leading to heart attack is obtained from

1 Streptobacillus

2 Saccharomyces

3 Thiobacillus

4 Sreptococci

View Answer

Answer: Sreptococci

65 The excreta of cattle, commonly called ‘gobar’ is rich in

1 Methanobacterium

2 Pseudomonas putida

3 Rhizobium

4 Bacillus species

View Answer

Answer: Methanobacterium

66 The biological control of agricultural pests, unlike chemical control is

1 Very expensive

2 Polluting

3 Self perpetuating

4 Toxic

View Answer

Answer: Self perpetuating

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