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