Which of the following involves passive transport? A. Uptake of cholesterol by cells to be incorporated into membranes.
B. The movement of mineral ions into a plant root hair cell
C. The uptake of glucose in red blood cells
D. The movement of glucose from lumen of small intestine into the intestinal epithelial cells

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.