RUHS
Second Year MBBS Examination
MBBS MICROBIOLOGY PAPER I
Date: 12-02-2020
Time: 3

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hours
Max Marks: 40
Instructions: Question 1 in Section A and
Question 5 in Section B are Compulsory.
Attempt any two questions from rest of the

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questions in each section. (Use separate
answer sheet for each section)
Section 1
1. Enumerate various methods of sterilization.
Describe the principle, working, control &

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uses of hot air oven (A. 29,31,33) (10)
2. Write short notes on: (5)
a. Indole test
b. Transduction
c. Bacterial capsule

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3. Write short notes on: (5)
a. Inspissations
b. Biological role of complement
c. Herd immunity

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4. Write short note on: (5)

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a. Selective medium
b. Endotoxin
c. Mantoux test
Section 2
5. Define hypersensitivity. Classify various types

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of hypersensitivity reactions. Explain Type-III
hypersensitivity reaction in detail (10)
6. Write short notes on: (5)
a. Mutational drug resistance
b. IgM antibody

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7. Write short notes on: (5)
a. Laboratory diagnosis of corynebacterium
diphtheria
b. Pathogenicity of salmonella typhi
8. Write short notes on: (5)

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a. T cell subsets
b. Atypical mycobacteria
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