In the absence of lactose, the repressor protein encoded by the I gene binds to the lac operator and prevents transcription. Binding of allolactose to the repressor causes it to leave the operator. This enables RNA polymerase to transcribe the three genes of the operon.
A tough-skinned tropical fruit, the mango features a sweet, orange- to red-color flesh inside when ripe. Kensington pride, Kent, Palmer and sensation are only a few of the many varieties of mango available through groceries and markets.
Description of mango fruit. This tropical fruit is high in vitamin C. Mango fruits contain 10-20 percent sugar and are important source of vitamin A. They have a rich, luscious aromatic flavor and a delicious taste in which sweetness and acidity are delicately blended.he mango fruit is a large, fleshy drupe, containing an edible mesocarp of varying thickness. The mesocarp is resinous and highly variable with respect to shape, size, color, presence of fiber and flavor.