Transcription - the mRNA that codes for either a specific...

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Transcription: making an RNA copy of a DNA sequence RNA polymerase opens the part of the DNA to be transcribed. Only one strand of DNA (the template strand ) is transcribed. RNA nucleotides are available in the region of the chromatin (this process only occurs during Interphase) and are linked together similar to the DNA process. The Genetic Code: Translation of RNA code into protein The code consists of at least three bases, according to astronomer George Gamow. To code for the 20 essential amino acids a genetic code must consist of at least a 3-base set (triplet) of the 4 bases. If one considers the possibilities of arranging four things 3 at a time (4X4X4), we get 64 possible code words, or codons (a 3-base sequence on
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Unformatted text preview: the mRNA that codes for either a specific amino acid or a control word). The genetic code was broken by Marshall Nirenberg and Heinrich Matthaei, a decade after Watson and Crick's work. Nirenberg discovered that RNA, regardless of its source organism, could initiate protein synthesis when combined with contents of broken E. coli cells. By adding poly-U to each of 20 test-tubes (each tube having a different "tagged" amino acid) Nirenberg and Matthaei were able to determine that the codon UUU (the only one in poly-U) coded for the amino acid phenylalanine....
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Transcription - the mRNA that codes for either a specific...

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