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| Modern Genetic Analysis Chapter 3. Gene Function Making Functional Transcripts Figure 3-3. Transcription of two genes. (a) RNA polymerase moves from the 3 end of the template strand, creating an RNA strand that grows in a 5 3 direction (since it must be antiparallel to the template strand). Note that some genes are transcribed from one strand of the DNA double helix; other genes use the other strand as the template. (b) A uracil is being added to the 3 end of the transcript for gene 1. Growth is thus 5 3.

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