What's the difference between purine and pyrimidines? - Purines contain two carbon-nitrogen rings and four nitrogen atoms - Pyrimidines contain one carbon-nitrogen ring and two nitrogen atoms Why do purines bond with pyrimidines in the DNA ladder? They are opposite poles and have the same number of hydrogren bonds
Depending on the weight of the bag, the costs of an overweight bag is going to range anywhere from as little as $50 to as much as $200 or more. For example, with United Airlines, overweight bags are going to cost $100 to $200 depending on how many pounds over the limit they are. The following is a chart showing the overweight luggage fee for popular airlines as of 2013:
United raised the fees on these routes from $50 to $70 a year ago. This latest increase matches the one Delta made earlier this year when it raised second checked bag fees on the same routes. The new fee applies only to tickets purchased after June 1, 2012.