Unit 2 · Exam weight 10–13%

Cell Structure & Function

Organelles, membranes, transport, and how compartmentalization enables life.

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Lessons

Cell Components & Compartmentalization

Eukaryotic organelles specialize functions inside membrane-bound spaces.

Plasma Membrane & Transport

Fluid mosaic model; selective permeability drives transport.

Tonicity, Water Potential & Cell Origins

Water potential predicts water movement; cells originated from simpler systems.

Featured diagram

Eukaryotic animal cell with labeled organelles

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