Cells - Biology 100

1. Which of the following had (or should have had) the slowest rate of diffusion?

   a)      dye in agar (gelatin)           b)  potassium permanganate in water

2. The diffusion of water molecules across a differentially permeable (semipermeable) membrane is called ____________.

3. Suppose that an investigator fills a dialysis tube with water and ties the ends.  She then places the tube in a salt solution.  What will happen to the weight of the tube after 30 minutes?

4. State the function of each structure listed below.

   plasma membrane

   rough endoplasmic reticulum

   Golgi apparatus

   nucleus

   ribosomes

5. Identify the cellular structures on a drawing of a cell: plasma membrane, nucleus, ribosomes, nucleolus, rough endoplasmic reticulum, smooth endoplasmic reticulum, Golgi apparatus, mitochondria, cilia, flagella, 

6. Name the extended structures on the cell photograph below..

   

7. Describe what happened to the cells in the photograph below.