REPRODUCTIVE HABITS. The bull shark is viviparous, and the age to reach sexual maturity depends on the geographic region in which it is located but usually the age is ten years old for males and 10.9 years old for females. Some individuals can mature when reaching eight years of age. Mating occurs in late spring and the summer.
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.
The lac operon is involved with the breakdown of lactose to use as a food source. The trp operon produces products that are used to manufacture an amino acid, tryptophan. The pathway controlled by the trp operon is an example of an anabolic pathway.The lac operon controls a catabolic pathway, one that breaks down complex molecules to release energy for biological work.he trp operon produces products that are used to manufacture an amino acid, tryptophan. The pathway controlled by the trp operon is an example of an anabolic pathway.