Membrane Structure

The purple regions of the image represent:

• phospholipid

• cholesterol

• proteins

• carbohydrates

What is the structure labeled "A"?

• Integral (channel) protein

• Peripheral protein

• Cholesterol

• Carbohydrate

Where would you most likely find water molecules?

• A only

• B only

• C only

• A and C

Explain how the fluid mosaic model describes the arrangement and movement of molecules in the cell membrane.

• It suggests that the membrane is a rigid structure with fixed proteins.

• It describes the membrane as a static layer of lipids and proteins.

• It proposes that the membrane is a flexible layer with proteins floating in or on the fluid lipid bilayer.

• It indicates that the membrane is composed only of carbohydrates.

Tags

DOK Level 3: Strategic Thinking

All cells are surrounded by cell membranes.

• true

• false

Tags

NGSS.MS-LS1-2

The cell membrane is also called the __________ __________.

• Nucleus Membrane

• Plasma Membrane

• Phosphorous Membrane

• Insane Membrane

Tags

NGSS.MS-LS1-2

"F" is pointing to what?

• The hydrophobic region of the cell membrane

• The hydrophilic region of the cell membrane

Analyze the role of cholesterol in the cell membrane and its impact on membrane fluidity.

• Cholesterol decreases membrane fluidity by making it more rigid.

• Cholesterol increases membrane fluidity by creating more space between phospholipids.

• Cholesterol stabilizes membrane fluidity by preventing it from becoming too rigid or too fluid.

• Cholesterol has no effect on membrane fluidity.

Tags

DOK Level 3: Strategic Thinking

What substance keeps the membrane rigid and is placed between the phospholipid tails?

• Lipid Tails

• Carbohydrates

• Cholesterol

• Proteins

What is the structure labeled "H"?

• Cholesterol

• Peripheral protein

• Integral (channel) protein

• Carbohydrate