Biology and Human Welfare
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See all →- Which of the following microbes is NOT involved in the preparation of household products?A. Aspergillus nigerB. LactobacillusC. Trichoderma polysporumD. Saccharomyces cerevisiaeE. Propionibacterium sharmaniiChoose the correct answer from the options… Answer: 2. A and C only Key idea: Separate household products from industrial products. Aspergillus niger is used for industrial production... 1
- Which of following organisms cannot fix nitrogen?A. AzotobacterB. OscillatoriaC. AnabaenaD. VolvoxE. NostocChoose the correct answer from the options given below: Answer: 2. D only Key idea: Volvox is a green alga and cannot fix nitrogen. Azotobacter (free-living bacterium) and Oscillatoria, Anabaena,... 1
- Which of the following is an example of non-distilled alcoholic beverage produced by yeast? Answer: 3. Beer Key idea: Beer and wine are made by fermentation without distillation. Whisky, brandy and rum are made by fermentation follo... 1
- Streptokinase produced by bacterium Streptococcus is used for Answer: 4. Removing clots from blood vessels Key idea: Streptokinase is a clot buster. It is produced by Streptococcus and is used as a medi... 1
- Match List I with List IIList I: A. Clostridium butylicum; B. Saccharomyces cerevisiae; C. Trichoderma polysporum; D. Streptococcus sp.List II: I. Ethanol; II. Streptokinase; III. Butyric acid; IV. Cyclosporin-AChoose the correct answer from the opti… Answer: 4. A-III, B-I, C-IV, D-II Key idea: match each microbe with the product it yields. Clostridium butylicum makes butyric acid (A-III).... 1
- Which one of the following statements is NOT correct? Answer: 3. Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries. Key idea: Algal blooms caus... 1