Ineed i'm confused with this question. explain.

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.

Which characteristic should describe all evidence collected by a scientist? true obvious objective subjective

What part of the body contains bile, an enzyme that break down lipids?