Cell Membrane Function and Structure Quiz

What is the primary function of cell membranes?

• To produce energy for the cell

• To enclose the contents of the cell and regulate passage of materials

• To synthesize proteins

• To store genetic information

What characteristic of phospholipids makes them form bilayers in water?

• They are completely hydrophobic

• They are completely hydrophilic

• They are amphipathic, having both hydrophilic and hydrophobic parts

• They are non-polar

Which type of protein spans the bilayer and is permanently attached to the membrane?

• Peripheral proteins

• Integral proteins

• Enzymatic proteins

• Structural proteins

What is the role of hydrophobic tails in the phospholipid bilayer?

• They attract water molecules

• They repel water, contributing to membrane fluidity

• They bind to proteins

• They store energy

What is the function of peripheral proteins in the cell membrane?

• They span the bilayer and transport ions

• They associate with one side of the membrane and are temporarily attached

• They store genetic information

• They produce energy for the cell

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

• Double Helix Model

• Lipid Bilayer Model

What is the role of surface carbohydrates in cell adhesion?

• They act as enzymes

• They serve as attachment points

• They transport materials

• They form tight junctions

Who proposed the fluid-mosaic model of membrane structure?

• Watson and Crick

• Singer and Nicolson

• Pasteur and Koch

• Franklin and Wilkins