Introduction to Microbiology MCQ Quiz | General Microbiology

1. Who is often referred to as the “Father of Microbiology” for his pioneering work with microscopes and discovery of “animalcules”?

2. The germ theory of disease was definitively proven by the work of which scientist?

3. Which of the following is NOT one of Koch’s postulates?

4. The primary structural difference between prokaryotes and eukaryotes is the absence of a:

5. The Gram stain differentiates bacteria based on the properties of their:

6. After Gram staining, Gram-positive bacteria appear:

7. Which component is characteristic of a Gram-negative bacterial cell wall but absent in a Gram-positive one?

8. The Ziehl-Neelsen stain (acid-fast stain) is primarily used to identify which genus of bacteria?

9. The primary function of bacterial endospores is:

10. Sterilization is the process of:

11. An autoclave achieves sterilization by using:

12. Which bacterial structure is a major virulence factor because it protects the bacterium from phagocytosis?

13. Bacterial pili (or fimbriae) are primarily involved in which process?

14. Microorganisms that are part of the body’s normal makeup and are generally not harmful are known as:

15. An organism that does not normally cause disease in a healthy host but can cause disease in an immunocompromised host is called a(n):

16. Which of the following is a defining characteristic of viruses?

17. Prions, which cause diseases like Creutzfeldt-Jakob disease, are composed solely of:

18. The main advantage of an electron microscope over a light microscope is its:

19. Prokaryotic ribosomes are described as 70S, which is composed of which two subunits?

20. Small, circular, extrachromosomal DNA molecules found in bacteria that often carry genes for antibiotic resistance are called:

21. The system of binomial nomenclature for naming organisms was developed by:

22. Which of these is an example of a eukaryotic microorganism?

23. Joseph Lister is credited with the development of:

24. The term ‘pathogenicity’ refers to:

25. Round-shaped bacteria are referred to as: