NUCLEUS - controls all the activities of the cell. contains instructions for making new cells or new organisms.
CYTOPLASM - a liquid gel in which most chemical reactions need for life take place, eg respiration.
CELL MEMBRANE - controls the passage of substances in and out of the cell.
MITOCHONDRIA - structures in the cytoplasm where oygen is used and most of the energy is released during respiration.
RIBOSOMES - all the proteins needed in the cells are made here, where protein synthesis takes place.
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