Question

Motile zygote of Plasmodium occurs in
A. Human RBCs
B. Human liver
C. Gut of female Anopheles
D. Salivary glands of Anopheles

Answer 1

Plasmodium completes its life cycle in two hosts and two stages: the sexual phase in the female host mosquito Anopheles and the asexual phase in the human body. The stages of the life cycle are classified into Plasmodium vivax : schizogony, gamogony, and sporogony.

Complete answer:
Malaria is a mosquito-borne disease caused by Plasmodium , a malarial parasite that produces toxins in the human body. Malaria parasites are transmitted from the infected female Anopheles mosquito to the healthy person. Plasmodium vivax is a parasite that causes malaria in humans. His life cycle is completed in two hosts: sexual in the female mosquito of Anopheles and asexual in the human body. The gametocytes are sucked by the female mosquito from the human host. These gametocytes then mature in the intestines of the female mosquito and produce a motile zygote.
The life cycle of Plasmodium is divided into the asexual phase in the human body and the sexual phase in the female host of the Anopheles mosquito.
The male and female gametes are sucked with the blood of the female mosquito. Gametocyte production involves gametogenesis (gamete formation) and fertilization (male and female gamete fusion) in the stomach of female Anopheles mosquitoes.
Male and female gametes are combined to form ookinete (a fertilized motile zygote) which is further formed into new sporozoites which are transferred to mosquito salivary glands and ready to infect a new host.

**Hence, option C-Gut of the female Anopheles is the correct answer. **

Note: Anopheles mosquitoes are one of the 41 genera of mosquitoes worldwide. Of the nearly 3,500 species of mosquitoes, about 430 are Anopheles. Antarctica is the only nation or location where these mosquitoes do not live due to the harsh conditions prevalent there.