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.
The 12 Absolutely Cheapest Places to Buy a House in America. NEW YORK (TheStreet) - Looking for a cheap place to buy a house? There's always Buffalo, one of the markets with the cheapest homes in the U.S., but there's a catch -- you could be buried under eight feet of snow. You should consider it, since Buffalo clocks in at No. 6 on this list of the most affordable places to buy a home in America, according to Coldwell Banker's annual Home Listing Report.