SZABMU AHS 2026 Bacteriology Free Quiz 3

1. What is the major component of the outer membrane of Gram-negative bacteria?

A. Peptidoglycan B. Lipopolysaccharide C. Teichoic acid D. Capsule

2. Which type of bacteria can grow both aerobically and anaerobically?

A. Require oxygen B. Cannot grow with oxygen C. Grow with or without oxygen D. Require CO2

3. What oxygen requirement do microaerophilic bacteria have?

A. Require no oxygen B. Require high oxygen C. Require low oxygen D. Require CO2

4. What temperature range is optimal for psychrophilic bacteria?

A. Low temperatures B. High temperatures C. Moderate temperatures D. Very high temperatures

5. What temperature range is optimal for thermophilic bacteria?

A. Low temperatures B. High temperatures C. Moderate temperatures D. Freezing temperatures

6. What environmental condition do halophilic bacteria require?

A. High pH B. High salt C. High temperature D. High pressure

7. What pH range is optimal for acidophilic bacteria?

A. High pH B. Low pH C. Neutral pH D. High temperature

8. What is commonly used as a solidifying agent in bacterial culture media?

A. Agar B. Gelatin C. Starch D. Cellulose

9. What is the purpose of selective media?

A. Allow all bacteria to grow B. Inhibit certain bacteria C. Differentiate bacteria based on metabolism D. Enrich for specific bacteria

10. What is the function of differential media?

A. Inhibit growth B. Promote growth C. Distinguish bacteria D. Provide nutrients