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