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Substrate- reactant of an enzyme- catalyst reaction

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Enzyme- protein catalyst that speeds up the rate of specific biological reactions

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Enzyme- protein catalyst that speeds up the rate of specific biological reactions

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Catalyst- substance that speeds up the rate of a chemical reaction

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Catalyst- substance that speeds up the rate of a chemical reaction

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Amino acid- Compound with an amino group on one end a carbonyl group on the other end.

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Protein- macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair

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Nucleic acids- Micromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus. 

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Nucleic acids- Micromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus. 

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Lipids- macromolecule made mainly from Carbon and hydrogen Atoms; include fats, oils, and waxes 

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Lipids- macromolecule made mainly from Carbon and hydrogen Atoms; include fats, oils, and waxes 

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Carbohydrate- compound made up of carbon, hydrogen, and oxygen atoms; type of nutrient that is the major source of energy for the body.

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Polymer- molecules composed of many monomers; make up macromolecules

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Monomer- small chemical unit that makes up a polymer

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Base-  A compound that produces hydroxide ions in solution

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Acid- compound that forms hydrogen ions (H+) in solution; a solution with a pH of less than 7 (51) 

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Acid- compound that forms hydrogen ions (H+) in solution; a solution with a pH of less than 7 (51) 

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Adhesion- Force of attraction between different kinds of molecules

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Cohesion- attraction between molecules of the same substance

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Cohesion- attraction between molecules of the same substance

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Valence electrons- electrons on the outermost energy of an atom

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Covalent bond- type of bond between atoms in which the electrons are shared

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Covalent bond- type of bond between atoms in which the electrons are shared

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Iconic bond- Chemical bond formed when one or more electrons are transferred from one Atom to another.

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Ion- atom that has a positive or negative charge

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Isotope- One of several forms of a single element, which contains the same number of protons but different numbers of neutrons.

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Atom- basic unit of matter