Common Epidemics, Their Causes and Prevention NDA Questions

NDA BIOLOGY

Common Epidemics, Their Causes and Prevention MCQ Questions


7.
Malaria in humans is caused by which genus of parasites?
A.
Leishmania
B.
Entamoeba
C.
Plasmodium
D.
Trypanosoma
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ANSWER :
C. Plasmodium
8.
Which species of Plasmodium causes the most severe (malignant) form of malaria?
A.
P. ovale
B.
P. falciparum
C.
P. malariae
D.
P. vivax
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ANSWER :
B. P. falciparum
9.
The vector responsible for transmission of malaria is:
A.
Female Aedes mosquito
B.
Female Culex mosquito
C.
Female Anopheles mosquito
D.
Male Anopheles mosquito
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ANSWER :
C. Female Anopheles mosquito
10.
In the life cycle of Plasmodium, the sexual reproduction (sporogony) occurs in:
A.
Male Anopheles mosquito
B.
Human RBCs
C.
Human liver cells
D.
Female Anopheles mosquito
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ANSWER :
D. Female Anopheles mosquito
11.
The characteristic symptom of malaria — recurring fever with chills — occurs due to:
A.
Blockage of blood vessels by parasites
B.
Rupture of infected RBCs releasing merozoites and toxins
C.
Multiplication of Plasmodium in liver
D.
Bite of infected mosquito
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ANSWER :
B. Rupture of infected RBCs releasing merozoites and toxins
12.
Which antimalarial drug, originally derived from the bark of Cinchona tree, was used for centuries to treat malaria?
A.
Artemisinin
B.
Quinine
C.
Chloroquine
D.
Primaquine
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ANSWER :
B. Quinine