Cell Membrane Function and Structure Quiz

What is the primary function of cell membranes?

• To produce energy

• To enclose cell contents and regulate internal conditions

• To store genetic information

• To synthesize proteins

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

• Permeability

• Flexibility

• Selectivity

• Rigidity

What is the nature of the phospholipid bilayer in cell membranes?

• Hydrophobic

• Hydrophilic

• Amphipathic

• Non-polar

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

• Peripheral proteins

• Integral proteins

• Receptor proteins

• Enzymatic 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

• Enzymes

What process results in the formation of glycolipids?

• Glycosylation of phospholipids

• Glycosylation of proteins

• Transduction

• Adhesion

What is the role of surface carbohydrates in cell adhesion?

• They act as enzymes

• They serve as attachment points

• They transport materials

• They function as receptors

Who proposed the fluid-mosaic model of membrane structure?

• Watson and Crick

• Singer and Nicolson

• Mendel and Darwin

• Hooke and Leeuwenhoek

What does the term "amorphous" refer to in the fluid-mosaic model?

• Ability to conduct electricity

• Ability to change size or shape

• Ability to transport proteins

• Ability to bind carbohydrates