Prions, Cell Structure, Prokaryotes, Eukaryotes, Microbial Genetics,
Microbial Physiology, Microbial Metabolism, Microbial Growth,
Microbial Motility, Microbial Interactions, Normal Microbiota,
Pathogenicity, Virulence, Vaccines, Antibiotics, Antimicrobial Agents,
Epidemiology, Disease Transmission, Emerging Infectious Diseases,
Zoonoses, Nosocomial Infections, Vector-Borne Diseases, Waterborne
Diseases, Respiratory Infections, Tick-Borne Diseases, Historical
Contributions to Microbiology, Public Health Interventions Exam
Questions Verified and Provided with Complete A+ Graded Rationales
Latest Updated 2026
_______________ are organisms that are too small to be seen with the unaided eye.
Microorganisms
________________ include bacteria, fungi, protozoa, microscopic algae, and viruses.
Microbes
___________________ refers to a rapidly growing cell.
Germ
Why are most microbes beneficial, and necessary for life?
Microbes break down wastes, are a major part of the food chain, make foods such as sourdough,
cheese, and beer possible, and are essential for vitamins B and K.
,What has the knowledge of microorganisms led to?
Prevention of food spoilage and disease occurrence. Also led to aseptic techniques to prevent
contamination in medicine and microbiology labs.
What are the 7 types of microorganisms?
Bacteria
Archaea
Fungi
Protozoa
Algae
Viruses
Multicellular animal parasites
What is bacteria?
A single-celled prokaryote with peptidoglycan cell walls. They divide by binary fission, and may "swim"
via appendages called flagella. They derive nutrition from organic or inorganic chemicals or
photosynthesis.
What are archaea?
A single-celled prokaryote WITHOUT peptidoglycan cell walls (or without cell wall) that often live in
extreme environmnents. Generally not known to cause disease in humans.
What are fungi?
A eukaryote with a distinct nucleus surrounding DNA genetic material with chitin cell walls. Absorbs
organic chemicals for energy.
, What type of fungi is unicellular?
Yeasts.
What types of fungi are multicellular?
Molds and mushrooms. Molds consist of masses of mycelia, which are composed of filaments called
hyphae.
What are protozoa?
A eukaryote that absorbs or ingest organic chemicals. May be motile via pseudopods, cilia, or flagella.
Free-living or parasitic, while some are photosynthetic. May reproduce sexually or asexually.
What are algae?
A eukaryote with cellulose cell walls that are found in freshwater, saltwater, and soil. Uses
photosynthesis for energy and produces oxygen and carbohydrates. May produce sexually or asexually.
What are viruses?
Acellular particles that consist of DNA or RNA core that is surrounded by a protein coat (coat may be
enclosed by lipid envelope). They are replicated ONLY when they are in a living host cell.
What is a multicellular animal parasite?
A eukaryote; multicellular animals that are not strictly microorganisms. Some have microscopic stages in
their life cycles.