Cell membranes contain a central bilayer formed by a) lipids b) protein pumps c) carbohydrates d) proteins

Which organelle breaks down sugar molecules that supply energy to the cell ?

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

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.