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.
Mangoes are very sweet and juicy, itâs a super yummy fruit. However, mangoes are only sweet and juicy when they are ripe. If you ever tried a mango that was not sweet and not juicy, you have eaten an unripe mango! Mangoes that are not ripe taste like cardboard â they are tough and lacking in flavor.