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