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.
Including rent, other U.S. cities among the most expensive included Chicago (7th), Miami (11th) and Los Angeles (13th). The cheapest cities last year among the 71 surveyed: Kiev, Ukraine, and the Bulgarian capital city, Sofia. Prices were 2.5 times higher in the Swiss cities than in those Eastern European capitals.