1 Phospholipids consist of a glycerol molecule, two fatty acids, and a phosphate group that is modified by an alcohol. 2  The phosphate group is the negatively-charged polar head, which is hydrophilic.  The fatty acid chains are the uncharged, nonpolar tails, which are hydrophobic.
There are 150 calories in a 1 cookie serving of McDonald's Oatmeal Raisin Cookie. Calorie breakdown: 36% fat, 59% carbs, 5% protein.
McDonald's doesn't post calorie information on it's menus, but it's readily available online now. For example, McDonald's Nutritional Guide lists the Big Mac as having 550 calories, the Quarter Pounder with cheese as having 520 calories, and small fries with 230 calories.