Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.

Each cell has (Sorry I don't know this one either) genes activated depending on it's job and what kind of cell it is.

It is the presence of Lactose that causes the repressor protein to fall off and unblock the gene on the lac operon.

If a gene is turned on then it is being expressed.

An additional circular chromosome found in some bacteria that is used in genetic engineering. Plasmid

answer; ///i believe the answer your looking for is (ribosomes);

just go with your heart buddy