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.
To cope with these assaults, cells are equipped with DNA maintenance checkpoints 3 to arrest cell cycle and facilitate DNA repair pathways. DNA maintenance checkpoints include (a) the DNA damage checkpoints that recognize and respond to DNA damage, and (b) the DNA replication checkpoint that monitors the fidelity of copying DNA 3.