Cell Membrane/Transport Quiz25/26

What will happen to Molecule C over time? Both molecules are small and can go through the membrane.

• Molecule C will stay on the left side (side A).
• Molecule C will completely move to the right side (side B)
• Molecule C will move to side B until it reaches an equilibrium.
• Molecule B will move over to side A with molecule C.

Molecules that are hydrophobic can easily pass through the plasma membrane if they are small enough.

• True
• False

What will happen when an animal cell was put into fresh water (hypotonic solution)?

• water will move into the cell (swell/burst).
• water will move out of the cell (shrink).
• solutes will move into the cell.
• solutes will move out of the cell

When comparing two solutions, the solution with the greater concentration of solutes(less water) is called __________________________.

• hypotonic
• hypertonic
• isotonic
• saturated

When the concentration of molecules on both sides of a membrane are the same, the solutions are _____________.

• hypotonic
• hypertonic
• isotonic
• saturated

Diffusion occurs because

• molecules constantly move and collide with each other.
• the concentration of a solution is never the same throughout a solution.
• the concentration of a solution is always the same throughout a solution.
• molecules never move or collide with each other.

Which statement describes the process of osmosis in an animal cell?

• Sugar molecules move across the cell membrane until the cell has enough energy to grow in size and divide
• Water molecules move across the cell membrane until solute concentrations are equal on both sides of the membrane
• Ions move across the cell membrane until the inside of the cell has a higher concentration of positive charges
• Enzymes move across the cell membrane until the cell has completed metabolism

A bilayer means three layers

• True
• False

This molecule is found throughout the membrane and one of its functions is to transport substances in and out of the cell.

• Cholesterol
• Protein
• Carbohydrates

What is number 7 on the cell membrane diagram?

• Cholesterol
• Phospholipid Bilayer
• Hydrophobic Tail
• Filaments
• Carbohydrate