Cornell notes — Cell Biology

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Cell Biology — Lecture 4Cornell notes · 14 Oct 2026What is a cell?Smallest unit of life; all living things are made of cells.Prokaryote vseukaryoteProkaryotes: no nucleus (bacteria). Eukaryotes: nucleus(plants, animals).OrganellesNucleus, ribosomes, ER, Golgi, lysosomes, vacuoles.MitochondriaSite of cellular respiration — makes ATP for the cell.Key wordsMembrane, cytoplasm, organelle, nucleus, ATP.SUMMARYCells are life’s building blocks. Eukaryotic cells keep DNA in a nucleus; mitochondria powerthe cell by making ATP.

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