Microbiology MCQs (Quiz 11) Posted on June 9, 2026June 10, 2026Author agropublishers 0 1. Agar considered an ideal solidifying agent for microbiological media, because ________________ It is chemically inert and does not significantly affect microbial growth It readily reacts with culture medium components It serves as the primary nutrient source for most bacteria It contains natural antibiotics that suppress contaminants 2. Boiling water at 100 oC is ineffective for true sterilization because it may fail to destroy ___________ Yeast cells Vegetative bacterial cells Bacterial endospores Fungal hyphae 3. Filtration removes microorganisms from liquids primarily by __________________ Denaturing proteins Oxidizing cellular components Destroying DNA Trapping microorganisms in filter pores 4. Which characteristic of agar most improves the reproducibility of microbiological experiments? Chemical stability and inertness Rapid biodegradation High protein content Antimicrobial properties 5. The antimicrobial activity of chlorine is mainly due to the formation of ________________ Nitric acid Hydrogen peroxide Hypochlorous acid Sulfuric acid 6. _______________ is the most commonly used method for sterilizing antibiotic solutions Boiling Autoclaving Membrane filtration Dry heat 7. Which of the following viral structures is responsible for host cell recognition and attachment? Envelope and/or capsid proteins Nucleic acid Capsid Matrix protein 8. The reserve food material in fungi is primarily ________________ Glycogen Cellulose Inulin Starch 9. Immunology is primarily concerned with the study of __________________ Genetic inheritance Cell division Immune system and its responses Microbial classification 10. Exposure to UV light may prevent bacterial reproduction because it _________________ Interferes with DNA replication Removes capsules Destroys endospores Inhibits respiration Loading … Question 1 of 10 Microbiology MCQs (Quiz 11)
