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| The basic unit of matter. |
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| The center of the atom which contains the protons and neutrons; in cells, structure that contains the cell's genetic material(DNA) and controls the cell's activities. |
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| A negatively charged particle; located outside the atomic nucleus. |
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| A substance consisting entirely of one type of atom. |
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| An atom of an element that has a number of neurons different from that of other atoms of the same element. |
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| A substance formed by the chemical combination of two or more elements in definite proportions. |
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| A link that holds together atoms in compounds |
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| A smallest unit of most compounds. |
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| A slight attraction that develops between the oppositely charged regions of nearby molecules. |
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| An attraction between molecules of the same substance. |
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| An attraction between molecules of different substances; in plants, attraction between unlike molecules. |
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| Material composed of two or more elements or compounds that are physically mixed together but not chemically combined. |
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| A mixture of two or more substances in which the molecules of the substances are evenly distributed. |
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| A substance that is dissolved in a solvent to make a solution. |
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| A substance in which a solute is dissolved to form a solution. |
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| A mixture of water and non dissolved materials. |
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| A measurement system used to indicate the concentration of hydrogen ions(H+) in solution; ranges from 0 to 14 |
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| A compound that forms hydrogen ions(H+)in solution. |
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| A compound that produces hydroxide ions (OH+) in solution. |
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| A weak acid or base that can react with strong acids or bases to help prevent sharp, sudden changes in pH. |
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| A small unit that can join together with other small units to form polymers. |
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| A large compound formed from combinations of many monomers. |
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| A compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body. |
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| A large macromolecule formed from monosaccharides. |
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| A macromolecule made mainly from carbon and hydrogen atoms; includes fats, oils, and waxes. |
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Definition
| A macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus. |
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| A monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base. |
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| A single-stranded nucleic acid that contains the sugar ribose. |
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Definition
| A nucleic acid that contains the sugar deoxyribose. |
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| A macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair and to make up enzymes. |
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| A compound with an amino group (−NH2) on one end and a carboxyl group (−COOH) on the other end. |
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| A process that changes one set of chemicals into another set of chemicals. |
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| An element or compound that enters into a chemical reaction. |
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| An element or compound produced by a chemical reaction. |
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| The amount of energy needed to get a reaction started. |
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| A substance that speeds up the rate of a chemical reaction. |
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| A protein that acts as a biological catalyst. |
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| A reactant of an enzyme-catalyzed reaction. |
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