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bond formed by the sharing of electrons between atoms...the strongest of the three chemical bonds
a weak bond formed, for example, by the slight positive charge at the hydrogen end of the water molecule reacting with the negative end of other molecules
the number of electrons in the outermost energy level of an atom; the combining capacity of an atom
combinations of atoms that have gained stability by completing the full complement of electrons in the outer-most shell
Sterol; large organic compounds made mostly of carbon and hydrogen with a small amount of oxygen; examples are fats, oils, waxes, and steroids; are insoluble in water and used by cells for energy storage, insulation, and protective coatings, such as in membranes
an organic compound that is made of one or more chains of amino acids and that is a principal component of all cells
Adenosine diphosphate (ADP)
results from the release of energy by separation of the terminal phosphate group
Nucleic acid; deoxyribonucleic acid, the material that contains the information that determines inherited characteristics
the D and L forms of an amino acid; isomers with the same structural formula but different spatial arrangements of atoms
purines or pyrimidines attached to a pentode sugar, but without a phosphate group; monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
have a hydrogen-to-oxygen ratio of 2:1; compound made up of carbon, hydrogen, and oxygen atoms...major source of energy for the human body
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