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Module 1 Exam - Portage Learning – Microbiology Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the main characteristic of prokaryotic cells?✔✔ They lack a membrane-bound nucleus
What is the function of the bacterial cell wall?✔✔ To provide structure and protect against osmotic pressure
What structure allows bacteria to move toward or away from stimuli?✔✔ Flagella
What is the purpose of a Gram stain in microbiology?✔✔ To differentiate bacteria based on their cell wall structure
What color do Gram-positive bacteria appear after Gram staining?✔✔ Purple 1 / 2
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What color do Gram-negative bacteria appear after Gram staining?✔✔ Pink or red
Which scientist is known for developing the process of pasteurization?✔✔ Louis Pasteur
What is the function of endospores in bacteria?✔✔ To allow survival in harsh conditions
What type of microorganism is typically single-celled and lacks a nucleus?✔✔ Bacteria
What type of microorganism is composed of nucleic acid enclosed in a protein coat?✔✔ Virus
What is the purpose of the capsule in some bacteria?✔✔ To evade the host’s immune response
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