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Don’t Be Cheeky!

Don’t Be Cheeky!. Using a tooth pick, gently scrape the inside of your cheek. Place the cells on to the slide . Place one drop of iodine onto your specimen. Place a cover slip over your specimen.

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Don’t Be Cheeky!

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  1. Don’t Be Cheeky! • Using a tooth pick, gentlyscrape the inside of your cheek. • Place the cells on to the slide . • Place one drop of iodine onto your specimen. • Place a cover slip over your specimen. • View your specimen under both low power (small objective) and high power (larger objective) and diagram what you see.

  2. Step #1: Behave In Lab

  3. Step 2: Your Cells are Quite Small • We will be using microscopes to view these mini structures.

  4. The Onion Cell

  5. The Onion Cell • Get a thin slice using your finger tips. • Place the thin onion slice onto the slide. • Place one drop of iodine onto your specimen. • Place a cover slip over your specimen. • View your specimen under both low power and high power and diagram what you see.

  6. Adding a drop of Iodine

  7. Plasmolysis • Prepare a slide with one fresh water seaweed (Elodea) leaf. • Diagram what you see. • Identify the chloroplasts (site of photosynthesis) and the cell wall. • Do not use the iodine indicator for this lab. • Add saltwater (Hypertonic solution) and describe what you see.

  8. Plasmolysis with an onion cell

  9. Plasmolysis

  10. Go Banana’s: Go Green! • Banana cells are also useful. Smear a little (less than the size of a sesame seed) on a glass slide. • Rub the cells apart, then put in a drop of Iodine solution. • Cover the glass slide with a cover-slip. • These cells contain starch grains.

  11. Three Banana Cells

  12. Coming Soon: Cell Division Lab

  13. Complete the entire lab packet. • Each person is responsible for turning in a completed lab packet. • You may work in groups of four. • When you are finished with your lab, please clean your slides for the next group and make sure you turn off the power source to your microscope.

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