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Plasmodium vivax MCQ • NEB/CEE Biology

CEE NEXUS Team April 30, 2026
Plasmodium vivax MCQ • NEB/CEE Biology

🦟 Plasmodium vivax (Malaria Parasite)

NEB / CEE Biology • Complete Study Material • Protozoa

Plasmodium vivax life cycle diagram showing stages in mosquito and human

📌 Figure: Life Cycle of Plasmodium vivax (Image source: Wikipedia)

📊 Scientific Classification

KingdomProtista
PhylumProtozoa
ClassSporozoa
GenusPlasmodium
Speciesvivax

Common name: Malaria parasite. Causes Benign Tertian Malaria.

Vector: Female Anopheles mosquito (definitive host).

Primary host: Human (intermediate host).

🔄 Life Cycle of Plasmodium vivax

Plasmodium vivax completes its life cycle in two hosts:

  • 🦟 Sexual cycle (Sporogony): In female Anopheles mosquito.
  • 🧑 Asexual cycle (Schizogony): In human liver and RBCs.

🧑 Asexual Cycle in Human (Schizogony)

1️⃣ Pre-Erythrocytic Cycle (Liver Stage)

Infective stage Sporozoite injected by mosquito → enters liver cells → forms Cryptozoites → undergo schizogony → produce Cryptomerozoites. Liver schizont ruptures releasing merozoites into blood.

Hypnozoites: Some sporozoites remain dormant in liver (cause relapse).

2️⃣ Erythrocytic Cycle (Blood Stage)

Merozoites enter RBCs → form Trophozoite (signet ring stage) → Schizont → Merozoites released → infect new RBCs. Cycle repeats every 48 hours.

3️⃣ Gametogony

Some merozoites differentiate into 🟡 Macrogametocyte (♀) and 🟢 Microgametocyte (♂) in RBCs.

🦟 Sexual Cycle in Mosquito (Sporogony)

Mosquito ingests gametocytes during blood meal → in gut: Fertilization → Zygote → Ookinete → Oocyst (on stomach wall) → produces Sporozoites → migrate to salivary glands → infective to human.

🤒 Pathogenicity & Symptoms

  • Febrile paroxysms: Cold stage → Hot stage → Sweating stage
  • Fever recurrence: Every 48 hours (tertian malaria)
  • Anaemia: Due to RBC destruction
  • Splenomegaly: Enlargement of spleen

💡 Important Key Points (Exam Focus)

  • Infective stage to human: Sporozoite
  • Infective stage to mosquito: Gametocyte
  • Site of fertilization: Mosquito gut (stomach)
  • Signet ring stage: Trophozoite in RBC
  • Relapse caused by: Hypnozoites in liver
  • Schizogony: Asexual multiplication in human
  • Sporogony: Sexual cycle in mosquito
  • Incubation period: 10-14 days
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🦟 Plasmodium vivax MCQ

NEB / CEE Biology • 50 MCQs

⏳ 10:00 📌 0/50 answered
🪱 Earthworm MCQ

1. Plasmodium vivax belongs to class:

2. Definitive host of Plasmodium is:

3. Infective stage of Plasmodium to human is:

4. Plasmodium vivax causes:

5. Fever in P. vivax malaria recurs every:

6. Signet ring stage of Plasmodium is a type of:

7. Schizogony in Plasmodium occurs in:

8. Fertilization in Plasmodium occurs in:

9. Hypnozoite is responsible for:

10. Pre-erythrocytic cycle of Plasmodium occurs in:

🧪 Periodic Table MCQ

11. Cryptozoites are formed in:

12. Sporogony refers to:

13. Oocyst is formed on:

14. Microgametocyte is:

15. Which stage is infective to mosquito?

16. Plasmodium belongs to phylum:

17. Splenomegaly in malaria is due to:

18. Incubation period of P. vivax is about:

19. Zygote in Plasmodium life cycle is:

20. The motile zygote of Plasmodium is called:

☢️ Nuclear Physics MCQ

21. Malaria is transmitted by:

22. Sporozoites are stored in mosquito's:

23. The shape of sporozoite is:

24. Quinine is obtained from:

25. Cold stage of malaria is characterized by:

26. Exo-erythrocytic cycle refers to development in:

27. Merozoites infect:

28. Schizont is a stage that:

29. How many merozoites are produced from one liver schizont?

30. Pigment formed from hemoglobin digestion by Plasmodium:

31. The vector of malaria belongs to genus:

32. Malaria is a:

33. The sporozoite injected by mosquito first enters:

34. Relapse in P. vivax is due to:

35. Macrogametocyte is:

36. The cycle in mosquito is called:

37. How many sporozoites are produced from one oocyst?

38. Prevention of malaria includes:

39. Trophozoite feeds on:

40. Anaemia in malaria is caused by:

🔄 Circular Motion MCQ

41. The term "tertian" in benign tertian malaria refers to fever every:

42. Ookinete penetrates the:

43. Which is NOT a stage in human blood?

44. The duration of erythrocytic cycle in P. vivax is:

45. Assertion (A): Plasmodium is a digenetic parasite.
Reason (R): It completes life cycle in two hosts.

46. Sporozoites are produced by:

47. The infective stage of Plasmodium is present in mosquito's:

48. Which species causes most severe malaria?

49. Exflagellation occurs in:

50. Plasmodium vivax is:

🔬 Microbiology Notes
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