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