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.
America's Most Affordable Cities. Try to purchase a home in New York City with a budget of $140,000 and the options are pretty limitedâa 375-square-f00t apartment in Queens may be the most luxurious possibility. In Los Angeles, buyers may have to look exclusively at inland foreclosures.