Microbiology MCQs (Quiz 5) Posted on June 8, 2026June 10, 2026Author agropublishers 0 1. Joseph Lister introduced the use of _______ to reduce infections during surgery Iodine Hydrogen peroxide Carbolic acid Alcohol 2. If a microorganism cannot grow without an organic carbon source, it is most likely a __________ Autotroph Photoautotroph Heterotroph Chemoautotroph 3. Most pathogenic bacteria are _________________________ Chemoheterotrophs Phototrophs Photoautotrophs Chemoautotrophs 4. A microorganism moves toward oxygen-rich regions. This specialized form of taxis is called __________________ Phototaxis Aerotaxis Geotaxis Thermotaxis 5. Which microscope provides the highest resolution among the following? Dark-field microscope Phase-contrast microscope Electron microscope Bright-field microscope 6. The enlargement of an image compared with the actual size of the specimen is known as ___________________ Magnification Resolution Refraction Illumination 7. __________________ microorganisms can synthesize organic compounds using carbon dioxide as their only carbon source Heterotrophs Chemoheterotrophs Photoheterotrophs Autotrophs 8. The primary function of an autoclave is to _______________________ Measure microbial growth Store culture media Observe microorganisms Sterilize materials using steam under pressure 9. Eukaryotic cytoplasmic ribosomes are ___________ 80S 70S 30S 50S 10. The fungal cell wall is primarily composed of ____________ Peptidoglycan Chitin Cellulose Lignin Loading … Question 1 of 10 Microbiology MCQs (Quiz 5)
