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.
Harlingen, Texas. You've probably never heard of a little place called Harlingen. This Texas town is a secret that your bank account is just waiting to discover especially if you have a big move or retirement plan in your future. Harlingen is the cheapest place to live in the United States by just about any measure. In fact, the cost of living here is a staggering 17 percent below the national average. Everything from real estate to a gallon of milk is likely to cost you less here than it will anywhere else in the country.