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OCR: Genome All the genes found in a normal cell's DNA Half-Life The time it takes fora substance to decay to one hal ofits initial concentration Hydrogen Bond The small attractive force that arises from the attraction between slightly positive hydrogen atom on one mol lecule and slightly negative charge on nearby nitrogen, oxygen or fluorine. Alone one hydrogen bond is weak however, the combination of many hydrogen bonds in a structure such as DNA is much stronger than the sum of the same number of hydrogen bonds Mass The material content ofa body Metabolism Chemical reactions that occur in an organism Meta abolism can be divided into catabolism and anabolism Catabolism is the break down complex molecules, such as glucose, to release energy. Anabolism is the production of larger molecules like ...