Cell Membrane Function and Structure Quiz

What is the primary function of cell membranes?

• To provide energy to the cell

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

• To produce proteins

• To store genetic information

What characteristic of cell membranes allows some materials to cross without assistance?

• Permeability

• Semi-permeability

• Impermeability

• Conductivity

What is the term used to describe a phospholipid that is both hydrophilic and hydrophobic?

• Amphipathic

• Hydrophobic

• Hydrophilic

• Bipolar

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

• Peripheral proteins

• Integral proteins

• Surface proteins

• Structural proteins

What holds the phospholipid bilayer together?

• Strong covalent bonds

• Weak hydrophobic associations

• Ionic bonds

• Hydrogen bonds

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 change membrane shape

Who proposed the fluid-mosaic model of membrane structure?

• Watson and Crick

• Singer and Nicolson

• Pasteur and Koch

• Franklin and Wilkins