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a molecule that accelerates (speeds up) a chemical reaction, by lowering its activation energy, without being changed by the reaction.
(also called polymers) large, more complex molecules formed when monomers join together.
the types, number and arrangement of the teeth of a mammal.
when a plant cell loses water and the cell membrane pulls away from cell wall.
the passage through which the nerve and blood vessels leave the root of the tooth.
an enzyme which acts on proteins.