Cell Membrane & Osmosis

Multiple Choice

In the picture, which represents a fatty acid?

• F
• G
• H
• J

Multiple Choice

What are the main structural differences between phospholipids and triglycerides?

• Phospholipids have a hydrophilic head and hydrophobic tail, while triglycerides have three fatty acid tails.

• Phospholipids are used for energy storage, while triglycerides are used for cell membrane structure.

• Phospholipids contain a glycerol backbone, while triglycerides do not.

• Phospholipids are found in cell membranes, while triglycerides are found in the cytoplasm.

Multiple Choice

Which is the easiest to cross the membrane unassisted?

• Small, nonpolar

• Small, polar

• Large, nonpolar

• Large, polar

Multiple Choice

 Look at the diagram of a cross-section of a cell membrane below. 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
• simple diffusion
• facilitated diffusion

Multiple Choice

This a picture of an animal and plant cell placed in a solution. Describe the solution?

• Isotonic

• Hypotonic

• Hypertonic

Multiple Choice

What is the difference between hypertonic, hypotonic, and isotonic solutions?

• Hypertonic has fewer dissolved solids than the item floating in it

• Hypotonic has more dissolved solids than the item floating in it

• Isotonic has the same concentration of dissolved solids as the item floating in it

• Hypertonic has the same concentration of dissolved solids as the item floating in it

Multiple Choice

The U-shaped tube has 2 different mixtures of salt water in it and the 2 solutions are separated from each other by a semi-permeable membrane. The membrane is not permeable to salt but it is to water. What will the tube look like in a few hours if it is left to rest a it is?

• The salt particles (red dots) will move to the right side of the tube.

• The salt particles (red dots) will move to the left side of the tube.

• water will move to the left side of the tube.

• water will move to the right side of the tube.

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident