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Biology in Human Welfare – Multiple Choice Questions (MCQs)

25. Which of the following cells are primarily attacked by HIV?
- A. Helper T-cells
- B. B-cells
- C. Neutrophils
- D. Eosinophils
26. Autoimmune diseases occur when the immune system attacks:
- A. Self-cells
- B. Foreign cells
- C. Bacteria
- D. Viruses
27. Allergies are caused by an exaggerated immune response to:
- A. Allergens
- B. Pathogens
- C. Antibiotics
- D. Vaccines
28. Malaria parasite requires two hosts to complete its life cycle. They are:
- A. Human and female Anopheles mosquito
- B. Human and male Anopheles mosquito
- C. Human and Aedes mosquito
- D. Human and Culex mosquito
29. The 'vector' for filariasis (elephantiasis) is:
- A. Culex mosquito
- B. Anopheles mosquito
- C. Aedes mosquito
- D. Tsetse fly
30. Typhoid fever is confirmed by:
- A. Widal test
- B. ELISA test
- C. PCR test
- D. MRI
31. In acquired immunity, 'memory' cells are important for:
- A. Faster and stronger secondary response
- B. Slower primary response
- C. Innate immunity
- D. Non-specific defense
32. Cocaine is obtained from:
- A. Erythroxylum coca
- B. Papaver somniferum
- C. Atropa belladonna
- D. Datura
33. Barbiturates are commonly used as:
- A. Sedatives
- B. Stimulants
- C. Painkillers
- D. Antihistamines
34. What is the main objective of breeding crops with high resistance to diseases?
- A. To reduce reliance on pesticides
- B. To increase water absorption
- C. To improve aesthetic appeal
- D. To increase nitrogen fixation
35. MOET' stands for:
- A. Multiple Ovulation Embryo Transfer
- B. Mass Ovulation and Embryo Transfer
- C. Multiple Organism Embryo Transfer
- D. Modern Ovulation and Embryo Technology
36. In animal breeding, 'inbreeding' is done to:
- A. Increase homozygosity
- B. Increase heterozygosity
- C. Introduce new traits
- D. Reduce disease resistance

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Biology in Human Welfare – Multiple Choice Questions (MCQs)

25. Which of the following cells are primarily attacked by HIV?

26. Autoimmune diseases occur when the immune system attacks:

27. Allergies are caused by an exaggerated immune response to:

28. Malaria parasite requires two hosts to complete its life cycle. They are:

29. The 'vector' for filariasis (elephantiasis) is:

30. Typhoid fever is confirmed by:

31. In acquired immunity, 'memory' cells are important for:

32. Cocaine is obtained from:

33. Barbiturates are commonly used as:

34. What is the main objective of breeding crops with high resistance to diseases?

35. MOET' stands for:

36. In animal breeding, 'inbreeding' is done to:

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