Sample Questions — Common diseases in humans
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MCQ
Pneumonia-causing bacteria infect which part of the human respiratory system?
✅ Correct Answer: D
Bacteria like Streptococcus pneumoniae and Haemophilus influenzae infect alveoli, leading to fluid accumulation and breathing issues.
MCQ
Q10. Which statement about Common Cold is incorrect?
✅ Correct Answer: B
It infects the nose and respiratory passage, not the lungs.
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MCQ
What toxic substance released by Plasmodium causes recurring fever in malaria?
✅ Correct Answer: C
Haemozoin is released upon RBC rupture, causing chills and fever every 3–4 days.
MCQ
Q11. Why do Ascaris infections often occur in individuals who consume unwashed vegetables?
✅ Correct Answer: B
Ascaris eggs are excreted in feces and can contaminate vegetables and water sources.
MCQ
Which pathogen causes typhoid fever in humans?
✅ Correct Answer: C
Salmonella typhi is a bacterium responsible for typhoid, primarily transmitted through contaminated food and water.
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