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Fiveable

🧬AP Biology Review

QR code for AP Biology practice questions

Unit 4 - Cell Communication and Cell Cycle

🧬AP Biology
Review

Unit 4 - Cell Communication and Cell Cycle

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025

Resources

In this session, Caroline reviews cell communication, signal transduction pathways, positive and negative feedback mechanisms, and the regulation of the cell cycle.