Diffusion Through a Membrane Lab Review

At the start of the lab, what was placed inside the dialysis tube (model cell)?

• glucose and iodine

• starch and iodine

• glucose and starch

• iodine and benedict's solution

Tags

NGSS.MS-PS1-2

At the start of the lab, what was placed inside the beaker (not in the tube)?

• starch and glucose

• iodine and starch

• glucose and water

• iodine and water

Tags

NGSS.MS-PS1-2

Which term best describes a cell membrane?

• completely permeable

• semi-permeable

• not permeable

Which molecule IS able to pass through the "cell" membrane?

• starch

• glucose

• starch and glucose

Why was glucose able to pass through the membrane, but starch was not?

Tags

NGSS.MS-LS1-2

Iodine is considered a __________________ indicator

• starch

• glucose

When iodine mixes with starch ________________________

• It turns light blue

• It turns yellow

• It turns a blueish/black

• nothing happens

Tags

NGSS.MS-PS1-2

Describe why the "cell" turned black at the end of the lab.

Did any starch diffuse out of the cell?

• Yes

• No

Tags

NGSS.MS-LS1-2

What is osmosis?

• The movement of molecules from high concentration to low concentration

• The movement of water from high concentration to low concentration

• The movement of water from low concentration to high concentration

• The movement of molecules from high concentration to low concentration