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Chapter 2, Lesson 1 Vocabulary Cells and Life An explanation of things or events based on scientific knowledge resulting from many observations and experiments Theory The theory which states that all living things are made of cells, all new cells come from existing cells and cells are the smallest unit of life Cell theory A molecules in which part of it has a negative charge and part of it has a positive charge Polar molecule Molecules that are formed by joining many small molecules together Macromolecule Macromolecules that form when long chains of molecules called nucleotides join together Nucleic acids The small molecules that join together to form nucleic acids nucleotides Macromolecules that are made from long chains of amino acid molecules Proteins A large macromolecule that does not dissolve in water Lipids Macromolecule that is made up of one or more sugar molecules carbohydrates
