Question

Identify the incorrect statements.
(A) Gametocytes of Plasmodium develop in the RBCs.
(B) Ascariasis pathogens are transmitted to a healthy person through the bite by female mosquito vectors.
(C) Entamoeba histolytica is a helminth parasite in the small intestine of humans, causing amoebiasis.
(D) Malarial parasite reproduces asexually in the gut of the mosquito.
(E) Filarial worms reside in the lymphatic vessels of the lower limbs.
Choose the correct answer from the options given below

• A. (A), (B) and (E) only
• B. (B), (C) and (D) only
• C. (A) and (B) only
• D. (C) and (D) only

Answer 1

The Correct Option is B

Let’s evaluate each statement to identify the incorrect ones:

(A) Gametocytes of Plasmodium develop in the RBCs: This statement is correct. The gametocytes of Plasmodium (the causative agent of malaria) develop inside the red blood cells (RBCs). These gametocytes are ingested by the mosquito when it feeds on an infected human.

(B) Ascariasis pathogens are transmitted to a healthy person through the bite by female mosquito vectors: This statement is incorrect. Ascariasis is caused by Ascaris lumbricoides, a roundworm, which is transmitted by ingesting contaminated food or water, not through mosquito bites.

(C) Entamoeba histolytica is a helminth parasite in the small intestine of humans, causing amoebiasis: This statement is incorrect. Entamoeba histolytica is a protozoan parasite, not a helminth (worm), and it causes amoebiasis in the large intestine, not the small intestine.

(D) Malarial parasite reproduces asexually in the gut of the mosquito: This statement is incorrect. The malarial parasite (Plasmodium) undergoes sexual reproduction in the gut of the mosquito. Asexual reproduction occurs in the human host, specifically in the liver and red blood cells.

(E) Filarial worms reside in the lymphatic vessels of the lower limbs: This statement is correct. Filarial worms (e.g., Wuchereria bancrofti) reside in the lymphatic vessels, particularly in the lower limbs, leading to lymphatic filariasis (commonly known as elephantiasis).

Thus, the incorrect statements are (B), (C), and (D).

The correct answer is (2) (B), (C) and (D) only.

Answer 2

Statement (B) is incorrect because Ascariasis is transmitted through contaminated food and water, not by mosquito bites. (C) is incorrect as Entamoeba histolytica is a protozoan, not a helminth, and resides in the large intestine. (D) is incorrect since the malarial parasite reproduces asexually in human RBCs, not in the mosquito’s gut. Understanding transmission and organism types clarifies these misconceptions.