1. Which stage of Plasmodium is injected into a human by the bite of an infected female Anopheles mosquito?
A.
Merozoite
B.
Sporozoite
C.
Gametocyte
D.
Ookinete
Correct Answer:
Sporozoite
Explanation:
Sporozoites are the infective stage injected into the human bloodstream during the bite of an infected female Anopheles mosquito.
2. After entering the human body, sporozoites first reach which organ?
A.
Liver
B.
Heart
C.
Kidney
D.
Lung
Correct Answer:
Liver
Explanation:
Sporozoites travel to the liver, where they enter liver cells and multiply during the initial stage of the Plasmodium life cycle.
3. What type of multiplication occurs in the liver cells during the early human stage of the Plasmodium life cycle?
A.
Binary fission
B.
Multiple fission
C.
Budding
D.
Conjugation
Correct Answer:
Multiple fission
Explanation:
Inside liver cells, Plasmodium undergoes multiple fission, producing many merozoites from one developing parasite.
4. Which stage of Plasmodium enters red blood cells after being released from the liver?
A.
Merozoite
B.
Sporozoite
C.
Zygote
D.
Oocyst
Correct Answer:
Merozoite
Explanation:
Merozoites released from infected liver cells enter red blood cells and begin the erythrocytic stage of the life cycle.
5. Inside a red blood cell, the actively feeding stage of Plasmodium is called the
A.
Trophozoite
B.
Sporozoite
C.
Ookinete
D.
Gametocyte
Correct Answer:
Trophozoite
Explanation:
The trophozoite is the growing and feeding stage of Plasmodium inside a red blood cell.
6. Which stage develops from a trophozoite inside a red blood cell?
A.
Schizont
B.
Zygote
C.
Ookinete
D.
Sporozoite
Correct Answer:
Schizont
Explanation:
The trophozoite grows and develops into a schizont, which contains many daughter merozoites.
7. What is released when an infected red blood cell ruptures?
A.
Merozoites
B.
Sporozoites
C.
Ookinetes
D.
Zygotes
Correct Answer:
Merozoites
Explanation:
A mature schizont causes the red blood cell to rupture, releasing merozoites that can invade other red blood cells.
8. Which Plasmodium stage is taken up by a mosquito when it feeds on the blood of an infected person?
A.
Gametocyte
B.
Merozoite
C.
Trophozoite
D.
Schizont
Correct Answer:
Gametocyte
Explanation:
Gametocytes are the sexual forms of Plasmodium that are ingested by the mosquito during a blood meal.
9. In the mosquito, fusion of male and female gametes produces the
A.
Zygote
B.
Merozoite
C.
Trophozoite
D.
Schizont
Correct Answer:
Zygote
Explanation:
Inside the mosquito, male and female gametes fuse to form a diploid zygote.
10. Which structure in the mosquito produces sporozoites after the development of Plasmodium?
A.
Oocyst
B.
Red blood cell
C.
Liver cell
D.
Trophozoite
Correct Answer:
Oocyst
Explanation:
The zygote develops into an ookinete, which forms an oocyst on the mosquito's gut wall; the oocyst produces sporozoites.
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