Emihle

Which of the following best describes the fluid mosaic model of the cell membrane?

• A rigid structure with fixed proteins

• A static lipid bilayer with embedded proteins

• A flexible lipid bilayer with proteins that move freely

• A solid structure composed only of phospholipids

What is the primary function of cholesterol in the cell membrane?

• To provide structural support and regulate membrane fluidity

• To transport substances across the membrane

• To facilitate active transport ions

• To act as a receptor for signal transduction

Which type of membrane proteins spans the entire lipid bilayer?

• Peripheral proteins

• Integral proteins

• Lipid-anchored proteins

• Glycoproteins

The hydrophilic heads of phospholipids in the membrane face:

• Only the exterior of the cell

• Only the extracellular space

• Both the intracellular and extracellular space

• The fatty acid tails

Which of the following is not a function of membrane proteins?

• Transport molecules

• Cell signaling

• Energy production

• Cell-to-cell recognition