t

noun

1. 1

   hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells

   thyroxine is 65% iodine

2. 2

   the 20th letter of the Roman alphabet

   thyroxine is 65% iodine

3. 3

   a unit of weight equivalent to 1000 kilograms

4. 4

   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

5. 5

   one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

6. 6

   a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine