Chapter Exam

Unit 6: Biology in Human Welfare — Online MCQ Test

Q: Which protozoan parasite causes amoebic dysentery in humans?

Answer: B. Entamoeba histolytica — Entamoeba histolytica is the causative organism of amoebiasis or amoebic dysentery. It infects the large intestine and causes abdominal pain and diarrhea.

Q: Which mosquito acts as the vector for malarial parasite in humans?

Answer: A. Female Anopheles — Female Anopheles mosquito transmits Plasmodium, the parasite that causes malaria. The parasite completes part of its life cycle in the mosquito.

Q: The infective stage of Entamoeba histolytica in humans is the:

Answer: B. Cyst — The cyst stage survives outside the host and enters humans through contaminated food or water. In the intestine, it releases trophozoites.

Q: A person infected with Plasmodium shows fever every 48 hours. This pattern is due to:

Answer: B. Synchronous rupture of infected RBCs — The malarial parasite multiplies inside red blood cells, and their synchronous rupture releases parasite products into blood. This produces periodic fever attacks.

ZOOLOGY · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board

Practice Unit 6: Biology in Human Welfare with a free chapter-wise online MCQ test for Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR ZOOLOGY. This chapter covers: Focusing on medical parasitology this chapter covers life cycles pathogenicity prevention of Entamoeba Plasmodium Ascaris Wuchereria bacterial viral fungal diseases and drug abuse.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 6: Biology in Human Welfare — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR ZOOLOGY — Unit 6: Biology in Human Welfare, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which protozoan parasite causes amoebic dysentery in humans?

A. Plasmodium vivax
B. Entamoeba histolytica ✓
C. Ascaris lumbricoides
D. Wuchereria bancrofti

Answer: B. Entamoeba histolytica
Entamoeba histolytica is the causative organism of amoebiasis or amoebic dysentery. It infects the large intestine and causes abdominal pain and diarrhea.

Which mosquito acts as the vector for malarial parasite in humans?

A. Female Anopheles ✓
B. Female Culex
C. Male Aedes
D. Housefly

Answer: A. Female Anopheles
Female Anopheles mosquito transmits Plasmodium, the parasite that causes malaria. The parasite completes part of its life cycle in the mosquito.

The infective stage of Entamoeba histolytica in humans is the:

A. Trophozoite
B. Cyst ✓
C. Sporozoite
D. Merozoite

Answer: B. Cyst
The cyst stage survives outside the host and enters humans through contaminated food or water. In the intestine, it releases trophozoites.

A person infected with Plasmodium shows fever every 48 hours. This pattern is due to:

A. Continuous release of toxins by adult mosquitoes
B. Synchronous rupture of infected RBCs ✓
C. Blockage of lymph vessels by worms
D. Formation of cysts in the intestine

Answer: B. Synchronous rupture of infected RBCs
The malarial parasite multiplies inside red blood cells, and their synchronous rupture releases parasite products into blood. This produces periodic fever attacks.

Which of the following is the most appropriate reason for avoiding self-medication with antibiotics in infectious diseases?

A. Antibiotics are effective against all pathogens including viruses
B. Improper use may lead to resistance and may not cure viral diseases ✓
C. Antibiotics always increase immunity
D. Antibiotics are used only for fungal infections

Answer: B. Improper use may lead to resistance and may not cure viral diseases
Antibiotics act against bacteria, not viruses, and unnecessary use can promote antibiotic resistance. Hence self-medication is unsafe and ineffective for many diseases.

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Unit 7: Type Study of Periplaneta Americana