Functions of cell organelles

• Cytoplasm


  Contains molecules for all cellular reactions
• Cell membrane


  Controls which substances enter and exit the cell

  Maintains cell integrity

  keep cytoplasm seperate from the external environment
• Nucleus


  Holds genetic material (DNA, chromosomes)

  Controls the function of the cell
• Nucleolus


  Holds the RNA

  Site of ribosome production
• Mitochondrion


  Site of cellular respiration, releasing energy for cell processes
• RER


  Transports materials around the cell
• Ribosome


  Site of protein synthesis
• SER


  Involved in lipid steroid hormone synthesis
• Cytoskeleton


  Gives shape and structure to cell

  Helps organise organelles and other substances found in the cytoplasm
• Golgi apparatus


  Packages and stores substances into vesicles for release from the cell e.g. protein
• Lyosomes


  contains digestive enzymes that break down waste products and foreign substances in the cell
• Centrioles


  arrange the formation of spindles during cell division in mitosis
• Vacuole


  membrane bound packages within cells
• Chloroplast


  Site of photosynthesis

  Usually contain green pigment (chlorophyll)
• Cell wall


  Provides structure

  gives plant cell rigidity

  surrounds cells of plants, bacteria and fungi
• Ribosome


  Site of protein synthesis