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:
Because there is limited space in the overhead bins and under the seats on United Airlines planes, the company limits the sizes of the carry-on baggage travelers may bring with them on flights. In addition to size limitations, other rules limit the types of things travelers can pack into their carry-on baggage. A traveler who brings carry-on luggage onto a United flight must bring a bag that is less than 22 inches tall. The luggage also needs to be less than than 14 inches wide and 9 inches deep. Any luggage that you bring on a United flight must be able to fit under your seat or in an overhead bin. In some instances -- particularly if you are among the last to board a plane -- there might not be a lot of room left to store a bag in an overhead bin.