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