Uranus orbits the sun every 84 years at an average distance of 1.8 billion miles (2.9 billion km) and spins on its own axis every 17 hours compared to 24 hours on Earth. Uranus has the coldest atmospheric temperature of any planet in the solar system, around -224C (-371F).Temperatures in its interior are lower than those found in the other outer planets, possibly less than 4500C (8132F) .ranus has the coldest atmospheric temperature of any planet in the solar system, around -224C (-371F). Temperatures in its interior are lower than those found in the other outer planets, possibly less than 4500C (8132F) .
Lac is the scarlet resinous secretion of a number of species of lac insects, of which the most commonly cultivated species is Kerria lacca.Cultivation begins when a farmer gets a stick (broodlac) that contains eggs ready to hatch and ties it to the tree to be infested.ac for dye has been somewhat replaced by the emergence of synthetic dyes, though it remains in use, and some juices, carbonated drinks, wine, jam, sauce, and candy are colored using it. Lac is used in folk medicine as a hepatoprotective and anti-obesity drug.
The lac operon, an inducible operon, is a mechanism used by bacterial cells as an economical means to restrict the expression of the structural genes necessary for metabolizing lactose, a disaccharide. These structural genes break down lactose when lactose is the best carbon source available within its environs.hen glucose is present, the CRP does not bind to the promoter and expression of the lac operon remains low even if lactose is present. However, when glucose is absent, the CAP binds to the promoter region and promotes transcription. Glucose does not directly regulate the binding of CRP. A cAMP-CRP complex is entailed.