AP Biology Unit Two

Which way would the purple molecules move through the semi-permeable membrane?

• From the  A side  to the B-side
• From the B side to the A side
• none of the purple molecules would move
• they would move equally back and forth in a state of dynamic equilibrium

The picture is an example of...

• active tranport
• passive transport
• diffusion
• osmosis

The cell membrane is solid and rigid.

• true
• false

Which of the following is responsible for getting large or charged (polar) molecules across the cell membrane?

• E
• B
• C
• D

Controlling what goes into or out of the cell with the help of energy is called

• active transport
• endocytosis
• passive transport
• exocytosis

Hydrophobic region of the cell membrane?

• E
• B
• C
• A 

Which form of active transport is being shown? (Inside of  the cell is tan colored) 

• Facilitated Diffusion
• Exocytosis
• Endocytosis
• Receptor-mediated endocytosis

A saltwater snail is placed in freshwater. What happens to its cells?

• They shrink
• They swell
• Nothing happens

Tags

NGSS.HS-LS1-3

Which statement about cholesterol molecules is true?

• They help hold a membrane together.
• They alter the fluidity of the membrane.
• They attach to carbohydrates.
• They disrupt membrane function.

Which type of membrane protein would likely be most easily removed in a laboratory experiment?

• Integral membrane proteins
• Channel proteins
• Peripheral membrane proteins
• Transmembrane proteins