50 points please help, will give brainliest
Fill in the blanks in the following paragraph:
The lac operon genes are a series of 3 genes used to create enzymes to digest the sugar _________. When lactose is NOT present a ___________ protein is attached to the promotor site, preventing ______________ from binding to the promotor site, and transcribing the DNA. This protein is also needs _____________ factors, which are a group of proteins which regulate transcription of genes. When lactose IS present, the ________________ protein falls off and __________________ binds to the promotor, initiating transcription.