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 contains natural antibiotics that suppress contaminants It serves as the primary nutrient source for most bacteria It readily reacts with culture medium components 2. Filtration removes microorganisms from liquids primarily by __________________ Destroying DNA Denaturing proteins Oxidizing cellular components Trapping microorganisms in filter pores 3. Which of the following viral structures is responsible for host cell recognition and attachment? Capsid Nucleic acid Envelope and/or capsid proteins Matrix protein 4. _______________ is the most commonly used method for sterilizing antibiotic solutions Membrane filtration Autoclaving Dry heat Boiling 5. Boiling water at 100 oC is ineffective for true sterilization because it may fail to destroy ___________ Bacterial endospores Yeast cells Fungal hyphae Vegetative bacterial cells 6. Immunology is primarily concerned with the study of __________________ Genetic inheritance Microbial classification Cell division Immune system and its responses 7. The antimicrobial activity of chlorine is mainly due to the formation of ________________ Hypochlorous acid Sulfuric acid Hydrogen peroxide Nitric acid 8. Exposure to UV light may prevent bacterial reproduction because it _________________ Destroys endospores Interferes with DNA replication Removes capsules Inhibits respiration 9. The reserve food material in fungi is primarily ________________ Glycogen Inulin Cellulose Starch 10. Which characteristic of agar most improves the reproducibility of microbiological experiments? High protein content Antimicrobial properties Rapid biodegradation Chemical stability and inertness Loading … Question 1 of 10 Microbiology MCQs (Quiz 11)
