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bio chapter 3 Flashcards Why do the phospholipids surrounding the cell form a bilayer?

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djhall1134
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  • Biology

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Why do phospholipids form a bilayer in water?

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CaptainBeyond

CaptainBeyond
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acobdarfq
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I think it has something to do with their polar-nonpolar makeup.  They have a polar head and a nonpolar tail.  Only the polar side bonds with water, so they form two layers so that the polar sides can stick out and bond with the water, while the nonpolar tails can face each other.  Imagine this:
p——n n——p
p——n n——p
And outside the double layer are water molecules bonding with the polar part:
wwww p——n n——p wwww
wwww p——n n——p wwww

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 Biology questions and answers

Why do phospholipids form a bilayer in water?

Question:

Why do phospholipids form a bilayer in water?

Phospholipids:

Phospholipids are biochemical molecules that are in the lipid family. They have a two long hydrocarbon ‘tails’ that are composed of mostly carbon and hydrogen atoms attached to a glycerol backbone. They also have a phosphate ‘head’ group attached to the glycerol backbone.

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Answer and Explanation:

The phopholipids form a bilayer in water because of hydrophobic and hydrophilic interactions. The hydrophobic tails do not interact with water, so…

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How a Phospholipid Bilayer Is Both Hydrophobic and Hydrophilic

from CLEP Biology: Study Guide & Test Prep

Chapter 4
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