Freeze Fracture Is a Technique Used to Visualize Membrane Proteins

question 181

Multiple Choice

Freeze fracture is a technique used to visualize membrane proteins. In this technique, cells are rapidly frozen and then split, separating the lipid bilayer into its two component layers. Transmembrane proteins stay associated with one layer and leave a pit in the other. The fluid mosaic model predicts what kind of pattern of proteins and pits?

• A)a random arrangement of proteins and pits
• B)a random arrangement of proteins, but an ordered arrangement of pits
• C)an ordered arrangement of proteins, but a random arrangement of pits

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