The UK's most valuable monument is deemed to be the 1,000-year-old Tower of London, which is worth an estimated Â£56billion to the British economy and came it at number five in the list of European list. Its value is six times more than its nearest rival the Colosseum in Rome, which is valued at Â£72billion.
Cell cycle checkpoints are control mechanisms in eukaryotic cells which ensure proper division of the cell.
Cell cycle checkpoints. A checkpoint is a stage in the eukaryotic cell cycle at which at which the cell examines internal and external cues and decides whether or not to move forward with division. The G1_1â1ââstart subscript, 1, end subscript checkpoint, at the G1_1â1ââstart subscript, 1, end subscript/S transition.