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