lac operon (lactose operon) is an operon required for the transport and metabolism of lactose in Escherichia coli and many other enteric bacteria. Although glucose is the preferred carbon source for most bacteria, the lac operon allows for the effective digestion of lactose when glucose is not available.n this case, when lactose is required as a sugar source for the bacterium, the three genes of the lac operon can be expressed and their subsequent proteins translated: lacZ, lacY, and lacA.
14 mountains are over 8,000 meters high, among them the K2, Nanga Parbat and Mount Everest, at 8,848 meter the worldâs highest mountain. The Himalayas extend over 1,500 miles (2,400 km) from the Indus Valley in the west to the Brahmaputra Valley in the east.They are between 100 and 250 kilometers wide.hey are a part of in Nepal, India, Pakistan, Tibet and Bhutan. The mountains are the highest in the world, reaching almost 9,000 meters above sea level. The Himalayas separate the Indian subcontinent from the inner part of Asia.
3. Kangchenjunga, Himalaya â peak of 8,586 meters (28,169 ft) on the border between Nepal and India. 10 Highest Mountains In The World: Kanchenjunga Mountain. 4. Lhotse, Himalaya â 8,516 meters (27,940 ft) on the border of China and Nepal. 10 Highest Mountains In The World: Lhotse.