• Contains and protects DNA
  • Passes DNA to daughter cells during cell division
  • Builds ribosomes
  • Copies DNA onto mRNA

Rough Endoplasmic Reticulum:
  • Makes more plasma membrane frome synthesized proteins and phospholipids
  • Folds proteins which are secreted by the cell or transported to other organelles
  • Transports proteins within the cell

Smooth Endoplasmic Reticulum:
  • Synthesis of lipids (fatty acids, phospholipids and sterioids)
  • Processes drugs and other harmful substances
  • Stores calcium ions for muscle contractions

Ribosomes (free or attached):
  • Site of protein synthesis
  • Translates mRNA into proteins

Golgi Apparatus:
  • Recieves and modifies proteins from the rough endoplasmic reticulum
  • Puts finished products into transport vesicles for extracellular transport

  • Carries out cellular respiration by converting the chemical energy in foods to ATP (adenosine triphosphate)

  • Believed to play a role in the synthesis of spindle fibers during cell division

  • Contains digestive enzymes
  • Breaks down food, bacteria, and damaged organelles

Plasma membrane:
  • Controls the passage of substances into and out of the cell.