Cell Membrane Function and Structure Quiz

What is the primary function of cell membranes?

• To produce energy

• To enclose and protect the cell's contents

• To synthesize proteins

• To store genetic information

What characteristic of cell membranes allows them to regulate the passage of materials?

• Permeability

• Flexibility

• Selectivity

• Rigidity

What is the nature of the phosphate head in a phospholipid?

• Hydrophobic

• Hydrophilic

• Amphipathic

• Non-polar

What type of proteins span the bilayer and are permanently attached to the membrane?

• Peripheral proteins

• Integral proteins

• Structural proteins

• Enzymatic proteins

What term describes the ability of phospholipids to have both hydrophilic and hydrophobic regions?

• Amphipathic

• Bipolar

• Hydrophobic

• Polar

What is one of the key functions of membrane proteins related to cell identification?

• Transport

• Recognition

• Adhesion

• Transduction

What process results in the formation of glycolipids?

• Glycosylation of phospholipids

• Glycosylation of proteins

• Transduction

• Adhesion

Which model describes the plasma membrane as having fluid and mosaic qualities?

• Lock and Key Model

• Fluid-Mosaic Model

• Enzyme-Substrate Model

• Double Helix Model

Who proposed the fluid-mosaic model of membrane structure?

• Watson and Crick

• Singer and Nicolson

• Pasteur and Koch

• Franklin and Wilkins

What is the role of surface carbohydrates in cell adhesion?

• They act as enzymes

• They serve as attachment points

• They transport materials

• They change membrane shape