Chapter Exam

Chapter 9: Medical Mycology — Online MCQ Test

Q: Which fungal infection is commonly known as ringworm?

Answer: B. Dermatophytosis — Dermatophytosis is caused by dermatophytes and typically produces ring-shaped lesions on skin, hair, or nails.

Q: Which of the following is a dimorphic fungus?

Answer: C. Histoplasma capsulatum — Histoplasma capsulatum is a classic dimorphic fungus, growing as a mold in nature and as yeast in human tissues.

Q: A patient has white curd-like patches in the mouth. Which infection is most likely?

Answer: A. Oral candidiasis — Oral candidiasis commonly presents with white curd-like plaques in the oral cavity due to Candida albicans.

MICROBIOLOGY · CLASS 12th · Tamil Nadu State Board

Practice Chapter 9: Medical Mycology with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 12th MICROBIOLOGY. This chapter covers: This chapter covers pathogenic fungi causing human infections ranging from superficial mycoses to systemic fungal diseases. It details fungal morphology spore types clinical diagno.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 9: Medical Mycology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 12th MICROBIOLOGY — Chapter 9: Medical Mycology, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which fungal infection is commonly known as ringworm?

A. Candidiasis
B. Dermatophytosis ✓
C. Aspergillosis
D. Cryptococcosis

Answer: B. Dermatophytosis
Dermatophytosis is caused by dermatophytes and typically produces ring-shaped lesions on skin, hair, or nails.

Which of the following is a dimorphic fungus?

A. Rhizopus
B. Aspergillus
C. Histoplasma capsulatum ✓
D. Penicillium

Answer: C. Histoplasma capsulatum
Histoplasma capsulatum is a classic dimorphic fungus, growing as a mold in nature and as yeast in human tissues.

A patient has white curd-like patches in the mouth. Which infection is most likely?

A. Oral candidiasis ✓
B. Athlete's foot
C. Tinea capitis
D. Sporotrichosis

Answer: A. Oral candidiasis
Oral candidiasis commonly presents with white curd-like plaques in the oral cavity due to Candida albicans.

Which sequence correctly matches the type of mycosis with its infection site?

A. Superficial mycosis - brain
B. Subcutaneous mycosis - skin and subcutaneous tissues ✓
C. Systemic mycosis - nails only
D. Opportunistic mycosis - hair shaft only

Answer: B. Subcutaneous mycosis - skin and subcutaneous tissues
Subcutaneous mycoses involve deeper skin layers and underlying subcutaneous tissues, often following traumatic implantation.

Which option best explains why antifungal therapy is more difficult than antibacterial therapy?

A. Fungi have no cell membrane
B. Fungal cells are identical to human cells
C. Fungal cells are eukaryotic and share many features with human cells ✓
D. Fungi cannot be cultured in the laboratory

Answer: C. Fungal cells are eukaryotic and share many features with human cells
Fungi are eukaryotes and share several cellular structures with human cells, so antifungal drugs must selectively target fungal-specific components like ergosterol or chitin.

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