Exploring Diffusion and Osmosis in AP Biology

What are the two main topics covered in this lab?

• Photosynthesis and Respiration

• Diffusion and Osmosis

• Genetics and Evolution

• Cell Division and Growth

In the context of diffusion, what happens when the lid of a perfume bottle is removed?

• Perfume molecules evaporate instantly

• Perfume molecules stay inside the bottle

• Perfume molecules move from high to low concentration

• Perfume molecules move from low to high concentration

What is the main difference between diffusion and osmosis?

• Diffusion involves solutes, osmosis involves water

• Diffusion requires energy, osmosis does not

• Diffusion occurs in solids, osmosis occurs in liquids

• Diffusion involves water, osmosis involves solutes

In the osmosis example, why do sugar molecules not move through the semi-permeable membrane?

• They are too large to pass through the membrane

• They are repelled by the membrane

• They dissolve in water

• They are bound to water molecules

What is the purpose of using dialysis tubing in the diffusion lab?

• To simulate a cell membrane

• To measure the rate of osmosis

• To test the permeability of starch

• To observe the color change of iki

What indicates the presence of starch in the diffusion lab?

• A green color change

• A yellow color change

• A blue color change

• A red color change

In the potato lab, what happens to the mass of potato cores in distilled water?

• The mass decreases

• The mass remains the same

• The mass increases

• The mass fluctuates

Why do potato cores lose mass in high sugar concentration solutions?

• Water moves into the potato

• Water moves out of the potato

• Sugar moves into the potato

• Sugar moves out of the potato

What is the purpose of measuring the mass of potato cores on day one and day two in the potato lab?

• To determine the sugar concentration in the solution

• To observe the effect of osmosis on the potato cores

• To test the permeability of the potato skin

• To measure the rate of diffusion

At what point does the potato core not change its mass in the sugar solution?

• When the solution is hypertonic

• When the solution is hypotonic

• When the solution is isotonic

• When the solution is saturated