Cell Transport

What is the primary structural component of the cell membrane?

• Protein channels

• Genetic material

• Phospholipid bilayer

• Ribosomes

Which type of transport allows small, nonpolar molecules like oxygen and carbon dioxide to pass directly through the cell membrane without using energy?

• Active transport

• Facilitated diffusion

• Simple diffusion

• Endocytosis

What process involves transport proteins helping larger or polar molecules move across the cell membrane from an area of high concentration to low concentration without using energy?

• Active transport

• Simple diffusion

• Facilitated diffusion

• Exocytosis

What type of transport requires energy to move molecules across the cell membrane from an area of low concentration to an area of high concentration?

• Simple diffusion

• Facilitated diffusion

• Passive transport

• Active transport