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 phospholipids makes them form a bilayer in water?

• They are completely hydrophobic

• They are completely hydrophilic

• They are amphipathic, having both hydrophilic and hydrophobic parts

• They are charged molecules

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

• Peripheral proteins

• Integral proteins

• Enzymatic proteins

• Structural proteins

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

• They are impermeable

• They are selective

• They are rigid

• They are transparent

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 glycoproteins?

• Glycolysis

• Glycosylation

• Photosynthesis

• Transcription

What is the role of surface carbohydrates in cell adhesion?

• They act as enzymes

• They serve as attachment points

• They transport materials

• They provide energy

Who proposed the fluid-mosaic model of membrane structure?

• Watson and Crick

• Singer and Nicolson

• Mendel and Darwin

• Franklin and Wilkins

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

• Ability to conduct electricity

• Ability to change size or shape

• Ability to store energy

• Ability to replicate