Cell Membrane and Transport Quiz

What is the primary structure of the cell membrane?

• Protein layer

• Nucleic acid layer

• Lipid bilayer

• Carbohydrate layer

Which type of proteins span the lipid bilayer?

• Peripheral proteins

• Cholesterol

• Integral proteins

• Glycoproteins

What is the process called when water moves across a membrane?

• Facilitated diffusion

• Active transport

• Osmosis

• Diffusion

Which molecules can easily diffuse across the lipid bilayer?

• Large polar molecules

• Charged ions

• Small nonpolar particles

• Proteins

What role do aquaporins play in cells?

• Synthesize proteins

• Store energy

• Facilitate water movement

• Transport ions

What is the term for the model that describes the cell membrane structure?

• Static model

• Lipid model

• Fluid mosaic model

• Protein model

Which of the following is NOT a function of membrane proteins?

• Energy storage

• Enzymatic activity

• Transport

• Recognition

What type of transport requires energy?

• Facilitated diffusion

• Osmosis

• Simple diffusion

• Active transport

Which type of molecules cannot diffuse through the lipid bilayer without assistance?

• Water

• Carbon dioxide

• Oxygen

• Glucose

What is the main characteristic of the plasma membrane?

• Completely permeable

• Selectively permeable

• Non-permeable

• Impermeable