MCQs Malaria l Human Health and Diseases - Class XII Biology for NEET 2025

 

Malarial Vector

Multiple Choice Questions

 

1. Which organism is responsible for causing malaria?

 a) Bacteria

 b) Virus

 c) Protozoan

 d) Fungus

 

2. Which Plasmodium species is responsible for the most severe form of malaria?

 a) Plasmodium  vivax

 b) Plasmodium  malariae

 c) Plasmodium falciparum

 d) Plasmodium  ovale

 

3. How does Plasmodium enter the human body?

 a) Through contaminated water

 b) Through the bite of an infected female Anopheles mosquito

 c) Through inhalation

 d) Through direct contact with an infected person

 

4. In which human cells do Plasmodium parasites initially multiply?

 a) Red blood cells

 b) Liver cells

 c) White blood cells

 d) Muscle cells

 

5. What substance released during the rupture of RBCs is responsible for the symptoms of malaria?

 a) Hemoglobin

 b) Haemozoin

 c) Plasminogen

 d) Fibrin

 

6. How often do the symptoms of malaria, such as chill and high fever, typically recur?

 a) Every day

 b) Every two days

 c) Every three to four days

 d) Once a week

 

7. What is the role of the female Anopheles mosquito in the life cycle of Plasmodium?

 a) Primary host

 b) Intermediate host

 c) Vector and intermediate host

 d) Definitive host

 

8. Where do Plasmodium parasites undergo further development after being taken up by a mosquito?

 a) In the mosquito's gut

 b) In the mosquito's blood cells

 c) In the mosquito's salivary glands

 d) In the mosquito's nervous system

 

9. Which form of Plasmodium is introduced into the human body by the mosquito?

 a) Merozoites

 b) Sporozoites

 c) Gametocytes

 d) Trophozoites

 

10. Why is the female Anopheles mosquito referred to as a vector in malaria transmission?

  a) It directly causes malaria

  b) It transmits the Plasmodium parasite to humans

  c) It acts as the primary host

  d) It prevents the spread of malaria

 

11. Which of the following is NOT a species of Plasmodium that causes malaria?

  a) Plasmodium vivax

  b) Plasmodium malariae

  c) Plasmodium falciparum

  d) Plasmodium trypanosoma

 

12. What is the initial symptom of malaria when the Plasmodium parasites attack RBCs?

  a) Rash

  b) High fever and chills

  c) Nausea and vomiting

  d) Diarrhea

 

13. Which stage of Plasmodium is found in the salivary glands of the mosquito?

  a) Merozoite

  b) Sporozoite

  c) Trophozoite

  d) Gametocyte

 

14. What is the significance of haemozoin inmalaria?

  a) It provides nutrition to the parasite

  b) It triggers the immune response in humans

  c) It causes the symptoms of chill and fever

  d) It helps in the reproduction of Plasmodium

 

15. What is the primary method of preventing malaria?

  a) Vaccination

  b) Use of antibiotics

  c) Controlling mosquito population

  d) Drinking clean water

 

Answer Key

 

1. c) Protozoan

2. c) Plasmodium falciparum

3. b) Through the bite of an infected female Anopheles mosquito

4. b) Liver cells

5. b) Haemozoin

6. c) Every three to four days

7. c) Vector and intermediate host

8. c) In the mosquito's salivary glands

9. b) Sporozoites

10. b) It transmits the Plasmodium parasite to humans

11. d) Plasmodium trypanosoma

12. b) High fever and chills

13. b) Sporozoite

14. c) It causes the symptoms of chill and fever

15. c) Controlling mosquito population

Also Read:

 Malaria

Dengue 

Chikungunya