BIOL 235
Yale University
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BIOL 235 Midterm 1B Guide.docx
- Exam (elaborations) • 8 pages • 2021
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MIDTERM 1- VERSION B 
1. Know components of the lipid bi-layer 
o The basic structural framework of the plasma membrane is the lipid bilayer, two 
back-to-back layers made up of three types of lipid molecules—phospholipids, 
cholesterol, and glycolipids 
o The bilayer arrangement occurs because the lipids are amphipathic molecules, which 
means that they have both polar and nonpolar parts. 
2. Bonds between water molecules- what type of bond is it? 
o Polar covalent/hydrogen bond 
3. Facilitat...
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