21. What is the symptom that shows that a person has malaria?
(A) Indigestion
(B) Shivering
(C) Stomach pain
(D) Vomiting
Answer:
(B) Shivering
Explanation:
Malaria is a parasitic infection characterized by classic, cyclical “attacks” that begin with intense shivering and chills, followed by a high fever and heavy sweating.
22. In which season Malaria is more common?
(A) Rainy season
(B) Winter
(C) Summer
(D) Spring
Answer:
(A) Rainy season
Explanation:
Malaria transmission peaks during and immediately following the rainy (monsoon) season, as the abundance of stagnant water provides the perfect breeding grounds for mosquito populations to explode.
23. Malaria is caused by
(A) Cockroach
(B) Female Anopheles mosquito
(C) Housefly
(D) Bees
Answer:
(B) Female Anopheles mosquito
Explanation:
Plasmodium parasites that cause malaria are transmitted to humans exclusively through the bites of infected female Anopheles mosquitoes.
24. Anaemia is caused due to the deficiency of
(A) Iron
(B) Copper
(C) Chlorophyll
(D) All of the above
Answer:
(A) Iron
Explanation:
The most common type of anemia is iron-deficiency anemia, which occurs when the body does not have enough dietary iron to produce adequate levels of hemoglobin for red blood cells.
25. Who discovered the parasite of Malaria?
(A) Dr. Ronald Ross
(B) Dr. Beaumont
(C) Dr. Hargobind Khurana
(D) Dr. Sarabhai
Answer:
(A) Dr. Ronald Ross
Explanation:
Sir Ronald Ross was a British medical doctor who won the Nobel Prize for discovering the malaria parasite in the gastrointestinal tract of a mosquito, proving the transmission mechanism.
