Question

Arrange the following in correct sequence of steps in erythrocytic cycle of malarial parasite.
A. Parasite feeds on hemoglobin
B. Parasite forms a schizont
C. Nucleus moves to one side
D. Food vacuole increases in size
E. Haemozoin granules are formed

• A. B C E D A
• B. A D C E B
• C. C A E B D
• D. D E B C A

Hint:

Feeding $\rightarrow$ Vacuole growth $\rightarrow$ Ring stage $\rightarrow$ Haemozoin $\rightarrow$ Schizont.

Answer 1

The Correct Option is B

Step 1: Concept
The erythrocytic cycle describes the growth and reproduction of Plasmodium within human red blood cells.

Step 2: Meaning
The parasite progresses through various stages: trophozoite, "signet ring," and schizont.

Step 3: Analysis
First, the parasite enters the RBC and begins feeding on hemoglobin (A). As it digests hemoglobin, a large food vacuole forms and increases in size (D). This pushes the nucleus to the periphery, creating the "signet ring" appearance (C). Insoluble byproduct haemozoin granules accumulate (E). Finally, the parasite undergoes multiple fission to form a schizont (B).

Step 4: Conclusion
The logical progression of development is A $\rightarrow$ D $\rightarrow$ C $\rightarrow$ E $\rightarrow$ B. Final Answer: (B)