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AP Biology/Unit 1: Chemistry of Life
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Phospholipid Bilayer Permeability
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When a specific protein is incorporated into a phospholipid vesicle, the vesicle becomes permeable to glucose. Which structural feature of the phospholipid bilayer explains why this protein is necessary for glucose transport?

A

The glycerol backbone creates steric hindrance

B

The hydrophobic core prevents passage of polar molecules

C

The phosphate heads repel all biological molecules

D

The fatty acid tails are too rigid to allow any passage

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