Onion Skin Cell

• Procedure to observing an onion skin cell:

  1. prepare temporary slide of onion epidermis cells stained with iodine solution. Remember to wear eye protection
  2. Observe cells on the slide using the low power objective lens of the microscope. select an area which has a single layer of cells.
  3. Change to a high power objective and select a cell which shows clearly most of the following structures - cell wall, nucleus, cytoplasm, vacuole
  4. Make a large biological drawing of the cell + draw labels of structures you observe
• 1. Prepare a temporary slide of onion epidermis cells, stained with iodine solution, Remember to wear eye protection.
• 2. Observe the cells on the slide using the low power objective lens of the microscope and select an area which has a single layer of cells
• 3. Change to a high power objective and select a cell which shows closest most of the following structures:

  • nucleus
  • cell wall
  • cytoplasm
  • vacuole
• 4. make a large biological drawing of the cell and label the structures you observe.
• Biological drawing of the cell and labelled structures observed