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1.3: Membrane Structure

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Draw a simplified diagram of the structure of the phospholipid, including a phosphate-glycerol head and two fatty acid tails.



Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
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Draw a simplified diagram of the structure of the phospholipid, including a phosphate-glycerol head and two fatty acid tails.



Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
Head = phosphate and glycerol
Tails = fatty acids
Image: *Draw a simplified diagram of the structure of the phospholipid, including a phosphate-glycerol head and two fatty acid tails.* Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
Define hydrophilic.



Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
Polar and/or charged molecules (or regions of molecules) to which water can attract.

"Water loving."
Image: *Define hydrophilic.* Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
Define hydrophobic.



Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
Nonpolar molecules (or regions of molecules) to which water will not attract.

"Water fearing."
Image: *Define hydrophobic.* Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
Define amphipathic.



Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
A molecule that contains both hydrophilic and hydrophobic regions.

i.e. a phospholipid
Image: *Define amphipathic.* Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
Outline the amphipathic properties of phospholipids.



Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
Amphipathic means there are both hydrophilic and hydrophobic regions in a single molecule. Phospholipids have a hydrophilic head region and hydrophobic tails.
Image: *Outline the amphipathic properties of phospholipids.* Understanding: Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.