Microbiology MCQs (Quiz 6) Posted on June 8, 2026June 10, 2026Author agropublishers 0 1. Which group of microorganisms contains 80S ribosomes in its cytoplasm? Bacteria Fungi Actinomycetes Cyanobacteria 2. Cyanobacteria are generally classified as ______________ Photoautotrophs Photoheterotrophs Chemoheterotrophs Chemoautotrophs 3. Which of the following materials cannot be sterilized in a standard autoclave and requires an alternative method? Nutrient agar Surgical instruments Heat-sensitive antibiotics Distilled water 4. Microbial nutritional group ________________ obtains both energy and carbon from organic compounds Photoautotrophs Photoheterotrophs Chemoheterotrophs Chemoautotrophs 5. The development of antiseptic surgery by Joseph Lister was inspired by the work of _______________ Edward Jenner Alexander Fleming Louis Pasteur Robert Koch 6. ______________________ is the primary purpose of culture media in microbiology Sterilization Microscopy Growth of microorganisms Identification 7. A bacterial population accumulates near a source of amino acids. This behavior indicates ___________________ Positive chemotaxis Random movement Phototaxis Negative chemotaxis 8. Bacterial cytoplasmic ribosomes are composed of _____________ 30S and 50S subunits 40S and 60S subunits 30S and 40S subunits 50S and 60S subunits 9. Which pair of scientists is most associated with the beginning and the end (respectively) of the Golden Age of Microbiology? Leeuwenhoek (beginning) and Fleming (end) Hooke (beginning) and Koch (end) Pasteur (beginning) and Ehrlich (end) Jenner (beginning) and van Leeuwenhoek (end) 10. An autoclave reaches 121°C, but the pressure gauge remains below the recommended level. What is the most likely consequence? Faster sterilization Incomplete sterilization due to insufficient steam penetration Improved spore destruction Effective sterilization Loading … Question 1 of 10 Microbiology MCQs (Quiz 6)
