Basics of Fungi & Classification MCQ Quiz | Mycology

Welcome to the Mycology quiz for MBBS students. This quiz is designed to test your foundational knowledge of fungi, including their basic structure, characteristics, and classification. You will encounter 25 multiple-choice questions covering key topics such as fungal cell composition, morphology (yeasts, molds, dimorphic fungi), reproductive strategies, and the major phyla of medical importance. This assessment is a great tool for self-evaluation and revision. After submitting your answers, you will see your score and a detailed review of each question with correct answers highlighted. For your convenience, you can also download all the questions along with their correct answers in a PDF format for offline study. Good luck!

1. The main structural component of the fungal cell wall is:

2. The primary sterol found in the fungal cell membrane, which is a target for many antifungal drugs, is:

3. A fungus that can exist as a mold at 25°C and as a yeast at 37°C is known as:

4. Which of the following is an example of a unicellular fungus that reproduces by budding?

5. The tangled mass of filamentous hyphae that constitutes the body of a mold is called:

6. Asexual spores produced by molds, such as Aspergillus and Penicillium, are known as:

7. Which phylum of fungi is characterized by the production of sexual spores within a sac-like structure called an ascus?

8. Rhizopus and Mucor species, known for causing mucormycosis, belong to which phylum?

9. The “Fungi Imperfecti” or Deuteromycota is a historical classification for fungi that:

10. The India Ink stain is a negative staining technique used to visualize the capsule of which fungus?

11. The most common culture medium used for the isolation and growth of fungi is:

12. Hyphae that lack cross-walls (septa) are described as:

13. Fungi are classified as what type of organism based on their cellular structure?

14. Aflatoxin, a potent hepatocarcinogen, is produced by certain strains of:

15. Tinea infections, such as ringworm and athlete’s foot, are caused by a group of fungi known as:

16. The phylum Basidiomycota includes which of the following?

17. What is the mechanism of action for polyene antifungals like Amphotericin B?

18. The ‘azoles’ class of antifungal drugs (e.g., Fluconazole) primarily works by:

19. Which fungus is a common cause of opportunistic pneumonia in immunocompromised patients, particularly those with HIV/AIDS?

20. The microscopic appearance of “spaghetti and meatballs” on a KOH mount of skin scrapings is characteristic of:

21. A patient with AIDS presents with severe headache and nuchal rigidity. A lumbar puncture is performed, and CSF analysis with India ink reveals encapsulated yeast. The most likely causative agent is:

22. What is the primary mode of nutrition for most fungi?

23. Which of these medically important fungi is a classic example of a dimorphic fungus?

24. Pseudohyphae, which are elongated yeast cells that do not detach after budding, are characteristic of:

25. Sexual spores of the phylum Zygomycota are known as:

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