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Extension concept - Hydrolysis of ATP

In the process of transcription the enzyme RNA polymerase adds nucleotides to the growing mRNA molecule. To achieve this the enzyme requires molecules called nucleoside triphosphate. The aim of this page is to explore the similarity between the ATP cycle and ATP hydrolysis with the process of transcription, when a mRNA molecule is made using DNA as a template.Why does RNA synthesis progress in just one direction?

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