Ahamed Posted October 22, 2010 Share Posted October 22, 2010 can someone explain me how, 4 bases became 64 bases... my text book says 4^3 is 64. But i cant understand what this mean... pls explain.. Link to comment Share on other sites More sharing options...
Mr Skeptic Posted October 22, 2010 Share Posted October 22, 2010 Its just the same as 2 10's become 100, 3 10's become 1,000, etc. Link to comment Share on other sites More sharing options...
Fuzzwood Posted October 22, 2010 Share Posted October 22, 2010 The text book does not say that. They are saying that each set of 3 mRNA bases (called a codon) can code for a total of 64 different things. 3 stop-codons which are used as a termination signal, 1 start-codon which is both used as an initiation signal and codes for metionine, and 61 remaining for the other 19 amino acids. Link to comment Share on other sites More sharing options...
Dak Posted October 31, 2010 Share Posted October 31, 2010 There are 4 possible bases: C, T, G and A. There are 3 bases in a codon. possibilities are CCC, CCT, CCG, CCA, CTC, CTT... etc. that's 64 possible three-base combinations (codons). The maths to work that out is: (4 possibilities for first position) X (4 possibilities for second position) X (4 possibilities for last position) = 4 X 4 X 4 = 4^3. Is that what you were after? Link to comment Share on other sites More sharing options...
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