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24 Cards in this Set

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  • Back
atom
smallest unit of matter that can't be broken down by chemical means
adhesion
attraction between different substances
amino acid
organic molecule that is the building block of proteins
activation energy
amount of energy required to start a chemical reaction
ATP
organic molecule composed of a base, a sugar, and 3 phosphate groups that acts as the main energy currency of cells
active site
site on an enzyme that attaches to a substrate
base
compound that reduces the concentration of hydrogen ions on a solution
compound
substance that is made of more than one kind of atom
cohesion
attraction between substances of the same kind
carbohydrate
organic compound composed of carbon, hydrogen, and oxygen; used by living things as an energy
element
substance that speeds up a chemical reaction
energy
capacity for doing work; the ability to move or change matter
enzyme
substance that speeds up a chemical reaction
ion
electrically charged atom or molecule
lipid
one of a family of nonpolar organic molecules that are not soluble in water; includes fat, phospolipids, and steroids
molecule
group of atoms held together by covalent bonds
monosaccharide
simple sugar that is the base unit of carbohydrates
nucleic acid
organic molecule made of nucleotides; stores hereditary information for cell function; DNA or RNA
nucleotide
subnit of nucleic acids consisting of a nitrogenous base, a sugar, and a phosphate group
DNA
(deoxyriboleuneutic acid) double-stranded, helical nucleic acid that stores hereditary information
protein
oraganic compound made of amino acids
RNA
(ribonucleic acid)a type of nucleic acid involved in protein synthesis
solution
homogeneous mixture of two or more substances
substrate
the substance on which an enzyme acts during a chemical reaction