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.
Below is a list and description of some of the world's great mountain ranges. The tallest mountain range in the world is the Himalayas and the longest is the Andes. Himalayas. The Himalayas stretch 1,491 miles through much of central Asia.They travel from Afghanistan and Pakistan through India, Nepal, and China all the way to Bhutan.he Alps are a major mountain range in central Europe. They pass through many European countries including France, Germany, Switzerland, Italy, Austria, and Slovenia. The tallest peak in the Alps is Mont Blanc at 15,782 feet located on the French-Italian border. The Alps took their place in history over the years.