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Macromolecule Vocab words
Bio Honors
9
Biology
9th Grade
09/22/2012

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Term
activation Energy
Definition
Minimum amount of energy needed for reactants to form products in a chemical reaction.
Term
catalyst
Definition
substance that speeds up a chemical reaction by reducing the activation energy and without itself being changed by the reaction
Term
endothermic
Definition
organism that generates its body heat internally by its own metabolism
Term
exothermic
Definition
noting or pertaining to a chemical change that is accompanied by a liberation of heat
Term
energy
Definition
the ability to do work
Term
enzyme
Definition
a protein that speeds up a biochemical catalyst by lowering the activation energy needed to start the reaction
Term
product
Definition
an atom, a molecule or a compound that results from a chemical reaction
Term
reactant
Definition
an atom, a molecule or a compound that enteres into a chemical reaction.
Term
substrate
Definition
and a reactant that fit together like a puzzle piece into an enzyme to make a reaction occur., Substrates and reacttants change shape after the reaction while the enzyme does not.
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