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Cell Membrane and Protein Function Quiz

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Questions and Answers

What are the two main components of the cell membrane?

Lipid tails and hydrophilic heads

Receptors and substrate binding

Cholesterol and ion gradients

Lipid bilayer and protein molecules (correct)

What percentage of the cell membrane's weight is made up of lipids?

50% (correct)

70%

20%

30%

What characteristic describes the orientation of lipid heads in the cell membrane?

Hydrophobic group close to polar heads

Hydrophobic group close to non-polar tails

Hydroxyl group close to polar heads (correct)

Hydroxyl group close to non-polar tails

What happens when there is a small tear in the lipid bilayer?

<p>Hydrophobic layers fold in on itself, creating a sealed component (A)</p> Signup and view all the answers

What is the movement capability of phospholipids across the leaflets of the lipid bilayer?

<p>Unable to move across leaflets (B)</p> Signup and view all the answers