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

To identify the incorrect statements from the given options, let's evaluate each one:

(A) Gametocytes of Plasmodium develop in the RBCs: This statement is correct. Gametocytes are the sexual forms of the Plasmodium parasite that develop in red blood cells (RBCs) before being taken up by mosquitoes.

(B) Ascariasis pathogens are transmitted to a healthy person through the bite by female mosquito vectors: This statement is incorrect. Ascaris lumbricoides, the parasitic worm causing Ascariasis, is transmitted through ingestion of 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 not a helminth; it is a protozoan parasite that causes amoebiasis in the intestines.

(D) Malarial parasite reproduces asexually in the gut of the mosquito: This statement is incorrect. The Plasmodium (malaria parasite) reproduces sexually in the gut of the mosquito. Asexual reproduction occurs in the human host.

(E) Filarial worms reside in the lymphatic vessels of the lower limbs: This statement is correct. Filarial worms such as Wuchereria bancrofti commonly reside in the lymphatic system, causing conditions such as lymphatic filariasis.

Thus, the incorrect statements are (B), (C), and (D). Therefore, the correct option is: (B), (C) and (D) only

Answer 2

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.