The Cell Membrane Is Often Referred to as Asymmetrical or "Mosaic

question 7

Multiple Choice

The cell membrane is often referred to as asymmetrical or "mosaic". This means that

• A) the phospholipids of the membrane can flip- flop such that phospholipids from the inner layer are exchanged with those from the outer layer.
• B) only certain substances can pass through the phospholipid bilayer freely, while others require the help of membrane proteins.
• C) both layers of the phospholipid bilayer are not identical in terms of protein type or number and phospholipid type.

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