10–13% of the AP exam. Key topics: Prokaryotic vs. eukaryotic cell structure and compartmentalization, Cell membrane: fluid mosaic model, phospholipid bilayer, membrane proteins, Passive transport: simple diffusion, facilitated diffusion, osmosis, Active transport: pumps, endocytosis, exocytosis, Organelle structure-function relationships: mitochondria, chloroplast, endoplasmic reticulum, Golgi apparatus, ribosomes, nucleus, vacuoles, lysosomes, Cell size constraints: surface area-to-volume ratio, Endomembrane system and vesicle trafficking.
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