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