Biology in Human Welfare – Multiple Choice Questions (MCQs)

1. 1. Which of the following is a bacterial disease in humans?

   • A. Influenza
   • B. Typhoid
   • C. Polio
   • D. Measles

2. 2. The causative agent of malaria is a:

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

3. 3. Which of the following is a fungal disease in humans?

   • A. Ringworm
   • B. Typhoid
   • C. Malaria
   • D. AIDS

4. 4. The immune system recognizes and responds to:

   • A. Antigens
   • B. Antibodies
   • C. Pathogens
   • D. Toxins

5. 5. Which type of immunity is provided by injecting preformed antibodies?

   • A. Active immunity
   • B. Passive immunity
   • C. Cellular immunity
   • D. Innate immunity

6. 6. Vaccines provide protection against diseases by stimulating the production of:

   • A. Antibodies
   • B. Antigens
   • C. Toxins
   • D. Enzymes

7. 7. Cancer cells are characterized by:

   • A. Uncontrolled cell division
   • B. Controlled cell division
   • C. Apoptosis
   • D. Differentiation

8. 8. Which of the following is a common method for early detection of cancer?

   • A. Biopsy
   • B. MRI
   • C. X-ray
   • D. Blood test

9. 9. Opioids are drugs that bind to opioid receptors in the:

   • A. Central nervous system and gastrointestinal tract
   • B. Lungs and kidneys
   • C. Muscles and bones
   • D. Skin and hair

10. 10. Marijuana is obtained from the plant:

    • A. Cannabis sativa
    • B. Erythroxylum coca
    • C. Papaver somniferum
    • D. Atropa belladonna

11. 11. Cirrhosis of the liver is caused by chronic use of:

    • A. Alcohol
    • B. Opioids
    • C. Cannabinoids
    • D. Barbiturates

12. 12. Which crop improvement method involves crossing two genetically dissimilar parents?

    • A. Hybridization
    • B. Mutation breeding
    • C. Polyploidy
    • D. Tissue culture