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