Cell Membrane Structure and Protein Functions Quiz

Membranes consist of a mosaic of diverse protein molecules embedded within a fluid phospholipid bilayer. (correct)

Membranes consist of a single layer of protein molecules within a fluid phospholipid bilayer.

Membranes are composed of a single type of protein embedded within a rigid phospholipid bilayer.

Membranes are composed of a rigid layer of protein molecules within a fluid phospholipid bilayer.

Maintain cell shape, coordinate changes inside and outside the cell, act as receptors for chemical messengers, catalyze reactions. (correct)

Maintain cell shape, store genetic information, catalyze reactions, transport materials across the membrane.

Maintain cell shape, store genetic information, act as receptors for chemical messengers, transport materials across the membrane.

Maintain cell shape, coordinate changes inside and outside the cell, act as energy storage, act as hormones.

They allow only water to pass through.

They allow some substances to cross more easily than others and block the passage of some substances altogether. (correct)

They allow all substances to cross equally.

They block the passage of all substances.

<p>Diffusion is the movement of a substance down its concentration gradient and is passive.</p> Signup and view all the answers

<p>Facilitated diffusion is the passive transport of a substance across a membrane and doesn't require energy.</p> Signup and view all the answers