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the 20th letter of the Roman alphabet a unit of information equal to a trillion (1,099,511,627,776) bytes or 1024 gigabytes one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose) a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity; exerts the same biological effects as thyroxine but is more potent and briefer hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells; "thyroxine is 65% iodine" a unit of weight equivalent to 1000 kilograms |
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