The sequence of bases on DNA codes for the sequence of amino acids in proteins. But there are 20 different amino acids and only 4 different bases, so the bases are read in groups of 3. This gives 64 combinations, more than enough to code for 20 amino acids.
10 cheapest places to live in the U.S. Ashland, Ohio, ranks as the 10th most affordable city in the U.S., according to the Council for Community and Economic Research. Ashland has a cost of living index of 87.6.
New York City is the most expensive US city to live in, and the 7th most expensive city in the world.Justin Sullivan/Getty. Out of 133 global cities ranked in the Economist Intelligence Unit's (EIU) recent Worldwide Cost of Living report â which highlights the most expensive and cheapest cities to live in â 16 US cities were represented.