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When physicians perform an organ transplant, they choose a donor whose tissues match those of the recipient as closely as possible. Which of these membrane components, important in cell recognition, is being matched?

On this diagram of a portion of a plasma membrane, the red objects are the _______ , the blue objects sticking out of the top are the _______ , the round purple objects are the _______ heads of the phospholipids, and attached to each of those are two _______ tails of the phospholipids. This whole model is called the _______ model of the plasma membrane. (Be sure to use correct spelling!) 

Small molecules such as fatty acids which can dissolve in lipids:

Which components of the cell membrane are responsible for actively carrying materials across the membrane?

You are told that the cells on a microscope slide are either plant, animal, or bacterial cells. You look at them and see cell walls and mitochondria. What can you conclude about the cells?

A plasma membrane surrounds:

The cell organelle responsible for processing and packaging materials is the:

The organelle that produces energy for the cell is the ___. (Your answer must be spelled correctly!)

Alpha helix and beta pleated sheet are each examples of which level of protein structure?

Match each description below with the family of macromolecules to which it applies.