The Fluid Mosaic Model

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Animation Assessment

Question 1 of 6

The image above illustrates our understanding of how typical cell membranes are structured. Which arrow is pointing at a protein?

Question 1 choicesChoice A., arrow aChoice B., arrow bChoice C., arrow cChoice D., arrow d

Correct.

Incorrect.

Question 2 of 6

The image above illustrates our understanding of how typical cell membranes are structured. Which arrow is pointing at a cholesterol?

Question 2 choicesChoice A., arrow aChoice B., arrow bChoice C., arrow cChoice D., arrow d

Correct.

Incorrect.

Question 3 of 6

The image above illustrates our understanding of how typical cell membranes are structured. Which arrow is pointing at the hydrophilic head group of a phospholipid?

Question 3 choicesChoice A., arrow aChoice B., arrow bChoice C., arrow cChoice D., arrow d

Correct.

Incorrect.

Question 4 of 6

Which of the types of molecules depicted in the figure above is amphipathic?

Question 4 choicesChoice A., integral membrane proteinsChoice B., cholesterolChoice C., phospholipidsChoice D., integral membrane proteins, cholesterol, and phospholipids

Correct.

Incorrect.

Question 5 of 6

Although the phospholipid molecules can be in constant lateral movement, they very rarely flip from one side of the bilayer to the other. Which of the following could explain this?

Question 5 choicesChoice A., The molecular attraction between the fatty acid tails is too strong.Choice B., The head groups are too large to fit between the interior fatty acid tails.Choice C., The head groups are repelled by the hydrophobic membrane interior.Choice D., The cholesterol keeps the phospholipids on the correct side.

Correct.

Incorrect.

Question 6 of 6

In the experiment that showed membrane fluidity, what was the purpose of shining a laser on the membrane?

Question 6 choicesChoice A., The laser light makes the proteins fluorescent.Choice B., The laser light destroys the dye fluorescence.Choice C., The laser light allows the dye to be seen with the microscope.

Correct.

Incorrect.

Assessment Summary

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