Cell Transport-- Passive Transport

What does the term 'phospholipid bilayer' refer to?

• A single layer of carbohydrates

• A double layer of proteins

• A double layer of lipids

• A single layer of lipids

Which molecules easily pass through the cell membrane without assistance?

• Large carbohydrates

• Large polar molecules

• Small non-polar molecules

• Charged ions

What role do transport proteins play in the cell membrane?

• Producing ATP

• Replicating DNA

• Facilitating the movement of molecules across the membrane

• Synthesizing lipids

What is the role of aquaporins in the cell membrane?

• To synthesize ATP

• To facilitate the diffusion of oxygen

• To assist in the transport of water molecules

• To produce lipids

What is a key characteristic of facilitated diffusion?

• It requires ATP

• It moves molecules from a low to high concentration

• It only transports proteins

• It involves the movement of molecules from high to low concentration without energy