Process, package and sort cell products Regulate what substances go in or out of a cell Contains genetic information and controls the development and functioning of the whole cell Holds the chromosomes in the nucleus Holds organelles in place Used for storage of food, water or waste Provides strength, protection, support and shape to the plant Food production site (photosynthesis) Site of ribosome formation Site of respiration and the production of energy Site of protein synthesis Provides and internal surface for chemical reactions and channels for materials to move through Break down wastes and is involved in digestion Involved in the formation of the spindle for mitosis