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I need help with number 3 Phospholipids. Thank you

1. What type of bonding is present in phospholipids-ionic or covalent? Explain! You will notice there are several double bonds contained in a phospholipid. What is a double bond and how does it influence the shape of a molecule? 2. Phospholipids are said to be amphipathic-that is they have one region that is polar and another that is nonpolar. The end containing the phosphorous and nitrogen is the polar end. Can you explain why this end is polar? Start by attempting to draw a Lewis structure of just the nitrogen and its attached atoms. Then do the same for the phosphorous and its attached atoms. Then look at both charge and electronegativity 3. 4. The other end of the molecule is nonpolar. Can you explain why? The plasma membrane is said to be a bilayer because it consists of two layers of primarily lipids. Can you explain why the phospholipid molecules have orientated themselves as shown in Figure 17.6? Note: the material both inside and outside of the cell membrane is a solution with water as the solvent. 5.

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