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Anonymous
ANSWERS: 2
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A lipid chain is not a sheet whereas the membrane is, so it will not contain/repel the necessary molecules. Water would not be able to pass in and out of a lipid chain, the phosphate groups allow water near the membrane for it to pass through the gaps or proteins.
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Q: Can you use a piece of string as a blanket? A: Only if you weave it together with a lot of other pieces of string. It's the difference between a line and a plane....
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