Cell & DNA Basics — TEAS & HESI Cheat Sheet
Organelles, DNA, transport
👤 By the CinnaEntry Content Team
🕐 Updated 2026-09-06
🏷️ TEAS Science
🔖 Free to read, print, and share
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Use this one-page guide to lock in Cell & DNA Basics for the ATI TEAS 7 and HESI A2. Keep it handy during review and on exam day.
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📒 The 1-minute cheat sheet
📌 Organelles
- Nucleus — stores DNA (the control center)
- Mitochondrion — makes ATP (energy 'powerhouse')
- Ribosome — builds proteins
- Cell membrane — controls what enters/leaves
📌 Dna
- Made of nucleotides: sugar + phosphate + base
- Bases pair A–T and C–G
- Genes code for proteins (traits)
📌 Transport
- Diffusion — solutes high → low (passive)
- Osmosis — WATER across a membrane (passive)
- Active transport — against gradient, needs ATP
✨Quick Tip
Focus on the highlighted terms — those are what the TEAS and HESI test most on cell & dna basics.
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