Membrane Structure and Function

Multiple Choice

The cell membrane of the red blood cell will allow water, oxygen, and carbon dioxide to pass through. Because other substances are blocked from entering, this membrane is called

• perforated

• selectively-permeable

• non-conductive

• permeable

Multiple Choice

Look at the cell membrane model above.

What is the name of the macromolecule that makes up the majority of the cell membrane?

• carbohydrates

• lipids

• nucleic acids

• proteins

Multiple Choice

What type of lipid is shown?

• Fatty Acid

• Phospholipid

• Triglyceride

• Cholesterol

Multiple Choice

What does the term hydrophobic mean?

• Dislikes water

• Loves water

• Uses water to create energy

• Positive and negative charge on either end

Multiple Choice

Which of the following best explains the difference between passive and active transport within cell membranes?

• Passive transport does not require chemical energy to occur; active transport requires energy, such as ATP.

• Passive transport happens only in the presence of water, while active transport does not require water to occur.

• Passive transport moves larger substances through the cell membrane; smaller molecules must move by active transport.

• Passive transport allows whole particles to move through the membrane, while active transport breaks particles down before they can pass through.

Multiple Choice

Look at the cross section of a cell membrane of a eukaryotic cell. H+ ions are being pumped from a low concentration to a high concentration. How do you describe this type of transport across the cell membrane?

• Active transport

• Passive transport

• Facilitated diffusion

• Co-transport

Multiple Choice

Look at the diagram of a cross-section of a cell membrane above. The cell membrane controls movement of materials into and out of the cell. The following particles are moving from high concentration to low concentration and are using a carrier protein. How would you describe this type of movement across the membrane?

• Simple osmosis

• Active transport

• Facilitated diffusion

• Simple diffusion

Multiple Choice

Osmosis occurs when there is a different concentration of solute molecules on each side of the membrane. The drawing below shows a beaker containing a 30% salt solution and a suspended cell containing a 10% salt solution. What statement best describes the cell after 20 minutes?

• Water will move from the cell into the beaker, resulting in a smaller cell.

• Water will move from the beaker into the cell, resulting in a larger cell.

• Salt will move from the cell into the beaker, resulting in a smaller cell.

• Salt will move from the beaker into the cell, resulting in a larger cell.