Exploring Diffusion and Osmosis in AP Biology Lab 1

What are the two main topics covered in the AP Biology Lab 1?

• Genetics and Evolution

• Diffusion and Osmosis

• Cell Division and Mitosis

• Photosynthesis and Respiration

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-2

In the diffusion example, what happens to the sugar molecules over time?

• They stay on one side of the membrane.

• They move to an area of higher concentration.

• They move to an area of lower concentration.

• They disappear from the solution.

Tags

NGSS.MS-PS1-4

What type of membrane is involved in osmosis?

• Impermeable membrane

• Flexible membrane

• Non-porous membrane

• Semipermeable membrane

In the osmosis example, why don't the sugar molecules move through the membrane?

• They are too large to pass through.

• They are chemically bonded to the membrane.

• They are repelled by the membrane.

• They dissolve in water.

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

• To hold the beaker in place.

• To act as a semipermeable membrane.

• To measure the temperature of the solution.

• To stir the solution.

What indicates the presence of starch in the diffusion lab?

• A yellow color change

• A green color change

• A blue color change

• A red color change

What is the main variable being tested in the potato lab?

• Temperature of the water

• Concentration of sugar in the water

• Type of potato used

• Size of the beaker

What happens to the mass of the potato in distilled water after one day?

• It increases

• It stays the same

• It dissolves

• It decreases

Tags

NGSS.MS-LS2-3

Why does the mass of the potato decrease in high molarity sugar water?

• Sugar moves out of the potato

• Water moves out of the potato

• Water moves into the potato

• Sugar moves into the potato

Tags

NGSS.MS-LS2-1

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

• When the solution is hypertonic

• When the solution is hypotonic

• When the solution is acidic

• When the solution is isotonic