Passive Transport Quiz

What is a characteristic of passive transport?

• Requires energy

• Moves against a concentration gradient

• Moves down a concentration gradient

• Involves active transport proteins

Which of the following is an example of passive transport?

• Active transport

• Endocytosis

• Simple diffusion

• Exocytosis

What is facilitated diffusion?

• Active transport using ATP

• Passive transport aided by transport proteins

• Movement of water through a membrane

• Transport of large molecules using vesicles

Which type of proteins aid in facilitated diffusion?

• Enzymes

• Structural proteins

• Channel and carrier proteins

• Receptor proteins

What is the role of transport proteins in the cell membrane?

• They allow passage of hydrophobic substances.

• They allow passage of hydrophilic substances.

• They block all substances from passing.

• They only allow gases to pass.

What do channel proteins with aquaporins facilitate?

• Passage of ions

• Passage of water

• Passage of proteins

• Passage of lipids

How do carrier proteins function in transport?

• They bind to molecules and change shape to shuttle them across the membrane.

• They dissolve molecules in the membrane.

• They repel molecules from the membrane.

• They break down molecules before transport.

What is facilitated diffusion?

• Movement of ions against the concentration gradient.

• Movement of hydrogen ions down the concentration gradient.

• Movement of water against the concentration gradient.

• Movement of proteins down the concentration gradient.