Nirenberg synthesized an m-RNA containing 34 | vedclass

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(C) Marshall Nirenberg and his colleagues used synthetic $m-RNA$ to decipher the genetic code. They synthesized a poly-adenine $m-RNA$ (a sequence of

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$A-A-A$ triplet

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(C) Marshall Nirenberg and his colleagues used synthetic $m-RNA$ to decipher the genetic code. They synthesized a poly-adenine $m-RNA$ (a sequence of $A-A-A-A...$). Since the resulting polypeptide chain consisted of $11$ lysine amino acids,and the $m-RNA$ had $34$ adenine bases,the ratio of bases to amino acids is $34/11 \approx 3$. This indicates that a sequence of $3$ adenine bases $(A-A-A)$ codes for one lysine molecule. Therefore,the genetic code is a triplet.

Nirenberg synthesized an $m-RNA$ containing $34$ poly-adenine and found a $11$ poly-lysine polypeptide structure. This proves that the genetic code for lysine is ......

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