Question

Choose the correct set of labels for the spots 1, 2, 3, 4 and 5 in the diagram from the options given below:

• A. 1 - Female Anopheles, 2 - Sporozoites, 3 - Merozoites, 4 - Trophozoites, 5 - Gametocytes
• B. 1 - Male Anopheles, 2 - Sporozoites, 3 - Merozoites, 4 - Trophozoites, 5 - Gametocytes
• C. 1 - Female Anopheles, 2 - Sporozoites, 3 - Merozoites, 4 - Trophozoites, 5 - Schizonts
• D. 1 - Female Anopheles, 2 - Sporozoites, 3 - Merozoites, 4 - Trophozoites, 5 - Schizonts

Answer 1

The correct option is A 1 - Female Anopheles, 2 - Sporozoites, 3 - Merozoites, 4 - Trophozoites, 5 - Gametocytes

Malaria is transmitted by the female Anopheles mosquito. The infectious forms injected by the mosquito are the sporozoites. Next the sporozoites grow and multiply, and form haploid merozoites. This is the stage invading the erythrocytes. In the erythrocytes, trophozoites are formed.The trophozoite develops into a schizont which is a mother cell. The schizonts rupture, releasing newly formed merozoites that then re-invade other red blood cells. Some of these merozoite-infected blood cells leave the cycle of asexual replication, and instead, the merozoites in these cells develop into sexual forms of the parasite, called male and female gametocytes.