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