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(biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription activator
chemical reaction in which one molecule is added to another addition reaction
force attracting atoms to each other and binding them together in a molecule affinity , chemical attraction
atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule ammonia clock
site on the surface of an antigen molecule to which an antibody attaches itself antigenic determinant , determinant , epitope
molecule component atom
one of the pairs of chemical bases joined by hydrogen bonds that connect the complementary strands of a DNA molecule or of an RNA molecule that has two strands; the base pairs are adenine with thymine and guanine with cytosine in DNA and adenine with urac base pair
compound containing two chlorine atoms per molecule bichloride , dichloride
energy required to separate particles from a molecule or atom or nucleus; equals the mass defect binding energy , separation energy
fullerene molecule having a cylindrical or toroidal shape carbon nanotube , nanotube
class of synthetic detergents in which the surface-active part of the molecule is the cation cationic detergent , invert soap
(chemistry) a series of linked atoms (generally in an organic molecule) chain , chemical chain
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule chemical group , group , radical
chemical group that gives color to a molecule chromophore
breaking of a chemical bond in a molecule resulting in smaller molecules cleavage
(chemistry) a chain of atoms in a molecule that forms a closed loop closed chain , ring
small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes coenzyme
any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration coenzyme Q , ubiquinone
chemical bond that involves sharing a pair of electrons between atoms in a molecule covalent bond
side bond that links two adjacent chains of atoms in a complex molecule cross-link , cross-linkage
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