This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 10 Microbes In Human Welfare – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 10 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How is bacteria helpful? A) Provide Nitrogen dioxide, food products, environmental recycling, medicine. B) Provide oxygen, food products, environmental recycling, medicine. C) Provide oxygen, food wastes, environmental recycling, medicine. D) Provide oxygen, food products, environment medicine. Show Answer Correct Answer: B) Provide oxygen, food products, environmental recycling, medicine. 2. Which one of the following alcoholic drinks is produced without distillation? A) Wine. B) Whisky. C) Rum. D) Brandy. Show Answer Correct Answer: A) Wine. 3. A bacterial infection ..... be treated using an antibiotic. A viral infection ..... A) Can; also can. B) Can; cannot. C) Cannot; can. D) Cannot; also cannot. Show Answer Correct Answer: B) Can; cannot. 4. Lactic Acid Bacteria grow in A) Milk. B) Curd. C) Water. D) Juice. Show Answer Correct Answer: A) Milk. 5. Which of the following sets of alcoholic beverages are produced by distillation of the fermented broth? A) Wine and Beer. B) Whisky, Brandy and Rum. C) Wine, Whisky and Brandy. D) Beer, Rum and Vodka. Show Answer Correct Answer: B) Whisky, Brandy and Rum. 6. The guts of various ruminants contain ..... A) Acidophiles. B) Halophiles. C) Methanogens. D) All of the above. Show Answer Correct Answer: C) Methanogens. 7. The flavour in yogurt is due to A) CH3COOH. B) CH3CHO. C) CH3COCH3. D) CH2CH2. Show Answer Correct Answer: B) CH3CHO. 8. The large vessels for growing microbes on an industrial scale are called A) Petri dish. B) Digestors. C) Biogas vessel. D) Fermentors. Show Answer Correct Answer: D) Fermentors. 9. Besides macroscopic plants and animals, microbes are the major components of biological systems on this earth. Microbes are present: A) Only in soil and water. B) Only in living organisms. C) Everywhere-soil, water, air, inside our bodies and that of other plants and animals. D) Only in extreme environments. Show Answer Correct Answer: C) Everywhere-soil, water, air, inside our bodies and that of other plants and animals. 10. A nitrogen fixing microbe associated with the fern Azolla in rice fields is A) Rankia. B) Rhizobium. C) Spirulina. D) Anabaena. Show Answer Correct Answer: D) Anabaena. 11. Which of these processes does not give off CO2? A) Lactate fermentation. B) Aerobic respiration. C) Alcoholic fermentation. D) None of the above. Show Answer Correct Answer: B) Aerobic respiration. 12. The bacterium that commonly lives in animal and human intestines is- A) Bacillus anthraces. B) Vibrio cholerae. C) Escherichia coli. D) Corynebacterium. Show Answer Correct Answer: C) Escherichia coli. 13. Microbes can survive in extreme environments such as thermal vents where the temperature may be as high as: A) 50$^\circ$C. B) 100$^\circ$C. C) 80$^\circ$C. D) 40$^\circ$C. Show Answer Correct Answer: B) 100$^\circ$C. 14. Bacillus thuringiensis is used to control: A) Fungal diseases. B) Bacterial infections. C) Insect pests. D) Weed growth. Show Answer Correct Answer: C) Insect pests. 15. How do Statins lower blood cholesterol? A) By breaking down cholesterol in the blood. B) By competitively inhibiting the enzyme responsible for synthesis of cholesterol. C) By preventing the absorption of cholesterol in the intestine. D) By increasing the excretion of cholesterol. Show Answer Correct Answer: B) By competitively inhibiting the enzyme responsible for synthesis of cholesterol. 16. ..... and ..... bacteria can fix atmospheric nitrogen while free living in the soil. A) Lactobacillus. B) Azospirillum and Azotobacter. C) Streptococcus and staphylococcus. D) Cyanobacteria and Nostoc. Show Answer Correct Answer: B) Azospirillum and Azotobacter. 17. Identify the bacteria that can fix atmospheric nitrogen while living freely in the soil: A) Rhizobium and Glomus. B) Azospirillum and Azotobacter. C) Nostoc and Glomus. D) Rhizobium and Azospirillum. Show Answer Correct Answer: B) Azospirillum and Azotobacter. 18. The technology of biogas production in India has been developed by the efforts ofA.Khadi and Village Industries Commision (KVIC)B. Indian Council of Agricultural Research (IARI)C.Indian Agricultural Research Institute (IARI)D. Indian Council of Medical Research (ICMR) A) A, C, D. B) C, D. C) A, C. D) A, B. Show Answer Correct Answer: C) A, C. 19. Which is useful to remove the oily stains in laundry A) Renin. B) Protease. C) Amylase. D) Lipase. Show Answer Correct Answer: D) Lipase. 20. Which one of the following is not a bio fertilizer A) Rhizobium. B) Nostoc. C) Mycorrhiza. D) Agrobacterium. Show Answer Correct Answer: D) Agrobacterium. 21. Which of the following is used in organ transplant patients? A) Cyclosporin A. B) Statins. C) Streptokinase. D) Pectinase. Show Answer Correct Answer: A) Cyclosporin A. 22. Match the Microbe with the Organic Acid it produces:(A) Aspergillus niger, (B) Acetobacter aceti, (C) Clostridium butylicum, (D) Lactobacillus (i) Lactic acid, (ii) Butyric acid, (iii) Citric acid, (iv) Acetic acid A) A-iii, B-ii, C-iv, D-i. B) A-iii, B-iv, C-ii, D-i. C) A-iv, B-iii, C-ii, D-i. D) A-ii, B-iv, C-iii, D-i. Show Answer Correct Answer: B) A-iii, B-iv, C-ii, D-i. 23. Biogas can be good substitute for A) Fuel wood. B) Coal. C) Charcoal. D) Oil and petrol. Show Answer Correct Answer: A) Fuel wood. 24. The chemical substances produced by some microbes which can kill or retard the growth of other microbes are called- A) Toddy. B) Lactic acid. C) Antibiotics. D) Ethanol. Show Answer Correct Answer: C) Antibiotics. 25. How are the spores of Bacillus thuringiensis applied by farmers? A) Injected into the plant stem. B) Mixed with water and sprayed onto vulnerable plants like brassicas and fruit trees. C) Mixed with soil near the roots. D) Released as adult flies. Show Answer Correct Answer: B) Mixed with water and sprayed onto vulnerable plants like brassicas and fruit trees. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 10 Microbes In Human Welfare Quiz 1Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 2Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 3Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 4Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 5Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 6Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 7Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 8Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 9Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books