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