Target Exam

CUET

Subject

Biology

Chapter

Human Health and Disease

Question:

Arrange the stages in the life cycle of Plasmodium after the bite of mosquito. 

(A) gametocytes in human RBCs
(B) sporozoites in mosquito's salivary glands
(C) sporozoites in human liver
(D) Fertilization in gut of mosquito host

Choose the correct answer from the options given below:

Options:

(A), (C), (D), (B)

(B), (A), (D), (C)

(C), (A), (D), (B)

(A), (B), (D), (C)

Correct Answer:

(C), (A), (D), (B)

Explanation:

The correct answer is Option (3) → (C), (A), (D), (B)

(C) sporozoites in human liver

(A) gametocytes in human RBCs

(D) Fertilization in gut of mosquito host

(B) sporozoites in mosquito's salivary glands

Explanation :

(C) Sporozoites in human liver:

The sporozoites travel through the bloodstream to the liver, where they infect liver cells and multiply.

(A) Gametocytes in human RBCs:

After the liver stage, the parasites enter the red blood cells (RBCs), where some of them develop into sexual forms known as gametocytes.

(D) Fertilization in gut of mosquito host:

When another mosquito bites the infected human, it takes up the gametocytes with blood meal, which then undergo fertilization and development in the mosquito’s intestine.

(B) sporozoites in mosquito's salivary glands:

Mature infective stages ( sporozoites) escape from intestine and migrate to the mosquito  salivary glands. When the      mosquito bites another human, sporozoites are injected with bite.

 

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    •                                   Stages in the life cycle of Plasmodium