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.
1. New York City. The Big Apple is at the top of the list, coming in as the most expensive city in America. Monthly rent is $4,078 versus close second San Franciscoâs $3,769. One of the biggest differences between the two coastal cities is transportation; New York Cityâs being 45 percent more expensive.