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The lac repressor protein is bound to the operator region of the lac operon when there is no lactose in the medium. When introduced in lactose, it binds to an allosteric site on the repressor causing its to change conformation and release from the operator. This allows the polymerase that is bound to the promoter region to proceed transcription of the lac operon genes (LacZ, Lac A, and Lac Y). Translation of these genes forms enzymes that enable the organism to break down lactose for energy.
Answer:
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Explanation:
Fat is used as a form of energy when the body really needs it. where as an enzyme is used to speed up a reaction in the body or might be needed to start a reaction in a body.
Photosynthesis in plants. Plants make food
through the process of photosynthesis. They get
the energy from the Sun. Plants store sugars as
their food. That is an energy-rich compound.
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