Part 2: Human Diseases – Protozoan & Helminth (25 MCQs)
Part 2: Human Diseases – Protozoan & Helminth (25 MCQs)
Q26. Malaria is caused by:
a) Plasmodium
b) Entamoeba
c) Wuchereria
d) Taenia
Answer: a
- a) Correct: Plasmodium (protozoan) causes malaria.
- b, c, d) Cause amoebiasis, filariasis, taeniasis.
Q27. The malarial parasite is transmitted by:
a) Male Anopheles
b) Female Anopheles
c) Culex
d) Aedes
Answer: b
- b) Correct: Female Anopheles mosquito transmits malaria.
Q28. Which Plasmodium species causes malignant (severe) malaria?
a) P. vivax
b) P. malariae
c) P. falciparum
d) P. ovale
Answer: c
- c) Correct: Plasmodium falciparum → malignant/brain malaria.
Q29. The infective stage of Plasmodium for humans is:
a) Trophozoite
b) Sporozoite
c) Gametocyte
d) Merozoite
Answer: b
- b) Correct: Sporozoites enter humans via mosquito bite.
Q30. The diagnostic stage of malaria in human blood smear is:
a) Sporozoite
b) Trophozoite & gametocyte
c) Ookinete
d) Sporoblast
Answer: b
- b) Correct: Trophozoites and gametocytes are seen in blood smears.
Q31. Amoebiasis is caused by:
a) Ascaris lumbricoides
b) Entamoeba histolytica
c) Wuchereria bancrofti
d) Giardia lamblia
Answer: b
- b) Correct: Entamoeba histolytica causes amoebic dysentery.
Q32. Amoebiasis spreads through:
a) Mosquito bites
b) Contaminated food and water
c) Airborne droplets
d) Sexual contact
Answer: b
- b) Correct: Cysts of Entamoeba spread via contaminated food/water.
Q33. Symptoms of amoebiasis include:
a) High fever and cough
b) Constipation and intestinal cramps
c) Dysentery with abdominal pain and cramps
d) Muscular paralysis
Answer: c
- c) Correct: Amoebiasis → abdominal pain, cramps, dysentery with mucus & blood.
Q34. Ascariasis is caused by:
a) Ascaris lumbricoides
b) Taenia solium
c) Entamoeba histolytica
d) Wuchereria bancrofti
Answer: a
- a) Correct: Ascaris lumbricoides (roundworm) → Ascariasis.
Q35. Mode of transmission of Ascariasis:
a) Mosquito bite
b) Contaminated food and water
c) Sexual route
d) Air droplets
Answer: b
- b) Correct: Eggs of Ascaris spread via contaminated food/water.
Q36. Common symptom of Ascariasis is:
a) Skin rashes
b) Intestinal blockage and abdominal pain
c) Sore throat
d) Cough only
Answer: b
- b) Correct: Roundworm infestation → intestinal blockage, abdominal discomfort.
Q37. Filariasis (elephantiasis) is caused by:
a) Ascaris
b) Wuchereria bancrofti / W. malayi
c) Plasmodium
d) Leishmania
Answer: b
- b) Correct: Wuchereria bancrofti and W. malayi (filarial worms) → Filariasis.
Q38. Vector of filariasis is:
a) Anopheles
b) Culex mosquito
c) Aedes
d) Sandfly
Answer: b
- b) Correct: Culex mosquito transmits Wuchereria.
Q39. Symptoms of filariasis include:
a) Liver damage
b) Inflammation of lymphatic vessels
c) Lung infection
d) Brain infection
Answer: b
- b) Correct: Filarial worms → lymphatic inflammation, swelling of limbs (elephantiasis).
Q40. Which of the following is NOT a helminthic disease?
a) Ascariasis
b) Filariasis
c) Amoebiasis
d) Taeniasis
Answer: c
- c) Correct: Amoebiasis = protozoan (Entamoeba). Others = helminthic.
Q41. Plasmodium completes sexual reproduction in:
a) Human liver
b) Human RBCs
c) Female Anopheles mosquito
d) Male Anopheles mosquito
Answer: c
- c) Correct: Sexual cycle of Plasmodium occurs in female Anopheles.
Q42. Malarial fever recurs every 48 hours due to:
a) Liver infection
b) RBC rupture releasing merozoites and toxins
c) Mosquito bites
d) Gametocyte fusion
Answer: b
- b) Correct: Fever corresponds to RBC rupture.
Q43. The dormant stage of Plasmodium in liver is:
a) Sporozoite
b) Hypnozoite
c) Merozoite
d) Gametocyte
Answer: b
- b) Correct: Hypnozoites in liver (in P. vivax/ovale) cause relapses.
Q44. The diagnostic test for malaria includes detection of:
a) Viral antigens
b) Parasite in blood smear
c) Bacterial culture
d) Immunoglobulin E
Answer: b
- b) Correct: Blood smear → trophozoites, gametocytes of Plasmodium.
Q45. Kala-azar (visceral leishmaniasis) is transmitted by:
a) Houseflies
b) Sandflies (Phlebotomus)
c) Culex mosquitoes
d) Tsetse flies
Answer: b
- b) Correct: Sandflies transmit Leishmania donovani.
Q46. Which one is NOT correctly matched?
a) Plasmodium – Malaria
b) Wuchereria – Filariasis
c) Ascaris – Ascariasis
d) Rhinovirus – Amoebiasis
Answer: d
- d) Correct: Rhinovirus causes common cold, not amoebiasis.
Q47. Best preventive measure for filariasis is:
a) Vaccination
b) Vector control (Culex)
c) Antibiotics
d) Antiviral therapy
Answer: b
- b) Correct: Filariasis prevention = mosquito control.
Q48. Which parasite is transmitted via “night bite” of mosquitoes?
a) Wuchereria
b) Plasmodium
c) Taenia
d) Leishmania
Answer: a
- a) Correct: Filarial worms (Wuchereria) → night-biting mosquitoes.
Q49. Proper disposal of human feces prevents:
a) Ascariasis and Amoebiasis
b) Pneumonia
c) Dengue
d) Common cold
Answer: a
- a) Correct: Ascariasis & amoebiasis spread via fecal contamination.
Q50. Which parasite is NOT matched with its disease?
a) Ascaris – Ascariasis
b) Entamoeba – Amoebiasis
c) Plasmodium – Typhoid
d) Wuchereria – Filariasis
Answer: c
- c) Correct: Plasmodium causes malaria, not typhoid.
Class 12 Biology MCQs, Human Health NCERT notes, NEET UG diseases questions, Immunity and vaccines MCQs, HIV AIDS cancer Biology, Pathogens Class 12 Biology, Adolescence drug abuse MCQs, Human diseases NEET prep, human health and diseases class 12 biology MCQs, NCERT human health and diseases chapter NEET questions, CBSE biology class 12 chapter 7 question bank, immunity and vaccines class 12 MCQs, HIV AIDS cancer class 12 biology NEET questions, adolescence drug alcohol abuse class 12 MCQs, human diseases NEET preparation online learning, pathogens and human diseases class 12 solved questions