Microbiology BasicsATI TEAS 7 cheat sheet

Bacteria, viruses, fungi

9 key facts Reviewed Oct 2026

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Bacteria

Prokaryotic — no nucleus, no membrane-bound organelles
Reproduce by binary fission
Treated with antibiotics

Viruses

Not cells and not considered alive on their own
Need a host cell to replicate
Antibiotics do nothing; antivirals and vaccines are the tools

Fungi & Protists

Eukaryotic; fungi have chitin cell walls (yeast, mold)
Protists are a mixed group — amoeba, paramecium, algae

Spread

Direct contact, droplet, airborne, vector, and contaminated food or water

Key takeaway

Bacteria, viruses, fungi

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