Microbiology MCQs (Quiz 3) Posted on June 7, 2026June 10, 2026Author agropublishers 0 1. The structure observed by Robert Hooke in cork was actually _____________ Dead cell walls Living plant cells Animal cells Bacterial colonies 2. Which instrument is used to sterilize culture media and laboratory equipment using high-pressure steam? pH meter Microscope Autoclave Incubator 3. Magnification refers to ___________________ Degree to which an image is enlarged Size of specimen Ability to distinguish two points Brightness of image 4. Which bacterial structure is selectively permeable? Cell wall Plasma membrane Capsule Flagellum 5. ______________ is the instrument used to magnify small objects Spectrophotometer Microscope Centrifuge Autoclave 6. The most commonly used microscope in microbiology laboratories is _______________ Dark-field microscope Electron microscope Fluorescence microscope Bright-field microscope 7. The major component of bacterial cell walls is _______________ Peptidoglycan Lignin Cellulose Chitin 8. Which of the following is NOT a branch associated with microbiology? Bacteriology Mycology Geology Virology 9. The standard sterilization cycle in an autoclave is generally ______°C, for _______minutes and at________ pounds per square inch (psi). 100°C for 5-10 minutes at 5 psi 80°C for 5-10 minutes at 10 psi 121°C for 15–20 minutes at 15 psi 60°C for 20-30 minutes at 15 psi 10. Which of the following correctly pairs a microorganism with the branch of microbiology that studies it? Plasmodium falciparum — Phycology Influenza virus — Bacteriology Saccharomyces cerevisiae — Mycology Escherichia coli — Virology Loading … Question 1 of 10 Microbiology MCQs (Quiz 3)
