Biology in Human Welfare – Multiple Choice Questions (MCQs)

1. 37. The process of growing micro-organisms or cells on a large scale for industrial purposes is called:

   • A. Bioreactor
   • B. Tissue culture
   • C. Fermentation
   • D. Biofortification

2. 38. Which of the following is a fermented beverage?

   • A. Bread
   • B. Yogurt
   • C. Cheese
   • D. Wine

3. 39. Biogas is primarily composed of:

   • A. Methane
   • B. Carbon dioxide
   • C. Nitrogen
   • D. Oxygen

4. 40. Biological Oxygen Demand (BOD) is a measure of:

   • A. Organic matter in water
   • B. Inorganic pollutants in water
   • C. Oxygen content in air
   • D. Acidity of water

5. 41. Secondary treatment of sewage involves:

   • A. Biological treatment
   • B. Physical treatment
   • C. Chemical treatment
   • D. Tertiary treatment

6. 42. Flocs in sewage treatment plants are:

   • A. Masses of bacteria associated with fungal filaments
   • B. Masses of algae
   • C. Inorganic precipitates
   • D. Dead fish

7. 43. Integrated Pest Management (IPM) involves:

   • A. Using a combination of pest control methods
   • B. Using only chemical pesticides
   • C. Using only biological control
   • D. Eliminating all pests

8. 44. Biological control of pests involves using:

   • A. Natural predators or parasites
   • B. Chemicals
   • C. Physical barriers
   • D. Genetic modification of pests

9. 45. The 'flu' is caused by a:

   • A. Virus
   • B. Bacterium
   • C. Fungus
   • D. Protozoan

10. 46. Elephantiasis (Filariasis) is caused by:

    • A. Wuchereria bancrofti
    • B. Plasmodium vivax
    • C. Entamoeba histolytica
    • D. Ascaris lumbricoides

11. 47. Which of the following is a non-infectious disease?

    • A. Cancer
    • B. Typhoid
    • C. Malaria
    • D. Tuberculosis

12. 48. The cultivation of mushrooms is known as:

    • A. Mycology
    • B. Pisciculture
    • C. Apiculture
    • D. Sericulture