CBSE Class 12 Microbes in Human Welfare Multiple Choice Questions with Answers. MCQ Questions Class 12 Microbes in Human Welfare with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT MCQ questions Class 12 Microbes in Human Welfare with Answers to know their preparation level.
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MCQ Questions Class 12 Microbes in Human Welfare with Answers - Set - 3
Question 1:
By anobacteria are useful biofertilizers in the; field of:
(a) Wheat
(b) Maize
(c) Rice
(d) Sugarcane
Correct Answer – (C)
Question 2:
In nostoc, enzyme nitrogenase occurs in :
(a) Vegetative cells
(b) Heterocysts
(c) Both (a) and (b)
(d) Only in hormogones
Correct Answer – (C)
Question 3:
A free living anaerobic nitrogen fixing bacterium is:
(a) Rhizobium
(b) Streptococcus
(c) Azotobactor
(d) Clostridium
Correct Answer – (D)
Question 4:
Azoila has symbiotic relationship with:
(a) Chlotfila
(b) Anabaena
(c) Nostoc
(d) Tolypothrix
Correct Answer – (B)
Question 5:
Streptococcus is used in the preparation of:
(a) Wine
(b) Idli
(c) Paneer
(d) Bread
Correct Answer – (C)
MCQ Questions Class 12 Microbes in Human Welfare With Answers
Question 6:
Usnic acid is an antibiotic obtained from :
(a) Fungi
(b) Bacteria
(c) Lichens
(d) Algae
Correct Answer – (C)
Question 7:
Citric acid is produced by:
(a) Rhizopus
(b) Mucor
(c) Aspergillus
(d) Saccharomyces
Correct Answer – (A)
Question 8:
Term antibiotic was first used by :
(a) Flemming
(b) Pasteur
(c) Waksman
(d) Lister
Correct Answer – (C)
Question 9:
Nif gene occurs in:
(a) Peiiicillium
(b) Rhizobium
(c) Aspergillus
(d) Streptococcus
Correct Answer – (B)
Question 10:
Bacillus thuringiensis (Bt) strains have been used for designing novel:
(a) Bio-metallurigcal techniques
(b) Bio-mineralization process
(c) Bio-insecticidal plants
(d) Bio-fertilizers
Correct Answer – (C)
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