Quiz

QUIZ

1. What is not a characteristic of protozoans?

a. They are motile b. They do not participate in photosynthesis c. They are unicellular d. They product toxins

Answer: d. Each of these is a typical characteristic of protozoans except that they do not generally produce any toxins.

2. When talking about protozoans, what is a trophozoite?

a. A protozoan that is metabolically inactive. b. A protozoan in the growth and feeding phase. c. The larval form of a larger protozoan. d. The protozoan that is encased in a cyst.

Answer: b. A protozoan that is in its growth and feeding phase is referred to as a trophozoite. When it undergoes encystment, it becomes a metabolically inactive cyst.

3. What is the main purpose of the cytoproct in certain types of protozoans?

a. Immunity b. Motility c. Cell structure d. Waste removal

Answer: d. The cytoproct is a specialized structure with regard to certain protozoans that is involved in the exocytosis of waste products for the organism.

4. What is the contractile vacuole used for in protozoans such as paramecium?

a. Salt and water balance b. Cell structure c. Compartmentalization of the cell d. Buoyancy

Answer: a. The contractile vacuole is a structure inside certain protozoal cells that are effective in water and salt balance.

5. What is the major characteristic of plasmodial slime molds?

a. They cause toxic blooms in the ocean b. They only have asexual reproduction. c. They do not aggregate d. They form multinucleated aggregates

Answer; d. A major characteristic of plasmodial slime molds is that they form multinucleated aggregates. The organisms undergo sexual reproduction.

6. Which of the Chromalveolata supergroup is known to cause malaria?

a. Theileria b. Babesia c. Plasmodium d. Toxoplasma

Answer: c. Plasmodium falciparum causes malaria after going through a complex life cycle that includes an insect vector. The others are of the same supergroup but cause different diseases in humans.

7. Which classification of fungal organisms leads to things like yeast infections and various skin-related fungal infections?

a. Zygomycota b. Basidiomycota c. Ascomycota d. Microsporidia

Answer: c. Ascomycota is the classification of fungal organisms that cause many different human diseases, including common yeast infections and dermatomycoses or skin infections.

8. What part of the human body is most affected by cryptococcosis, histoplasmosis, and Coccidiomycosis?

a. Brain b. Lungs c. GI tract d. Skin

Answer: b. These organisms are notable for causing lung infections and many will cause these types of infections only in the immunosuppressed patient.

9. Which type of helminth parasite has proglottids that release eggs into the feces of the definitive host?

a. Tapeworms b. Pinworms c. Liver flukes d. Trichinella

Answer: a. Tapeworms are segmented, with segments that are called proglottids. The proglottids release eggs into the environment that are then eaten by an intermediate host.

10. What aspect of algae can be pathogenic or dangerous to humans?

a. They can infect the Gi tract, leading to gastroenteritis. b. They can make toxins in algal blooms that can be toxic. c. They can cause dermatoses or skin infections. d. They can get into the lungs, leading to lung infections.

Answer: b. The most pathogenic part of algae is their ability to make toxins in algal blooms that are toxic to humans and aquatic animals.