# RNA Transcription Given a DNA strand, return its RNA complement (per RNA transcription). Both DNA and RNA strands are a sequence of nucleotides. The four nucleotides found in DNA are adenine (**A**), cytosine (**C**), guanine (**G**) and thymine (**T**). The four nucleotides found in RNA are adenine (**A**), cytosine (**C**), guanine (**G**) and uracil (**U**). Given a DNA strand, its transcribed RNA strand is formed by replacing each nucleotide with its complement: * `G` -> `C` * `C` -> `G` * `T` -> `A` * `A` -> `U` ## Hints For this exercise the following F# feature comes in handy: - [Match Expressions](https://fsharpforfunandprofit.com/posts/match-expression/) While this can be solved using a dictionary, using a match expression is more idiomatic. ## Running the tests To run the tests, run the command `dotnet test` from within the exercise directory. ## Autoformatting the code F# source code can be formatted with the [Fantomas](https://github.com/fsprojects/fantomas) tool. After installing it with `dotnet tool restore`, run `dotnet fantomas .` to format code within the current directory. ## Further information For more detailed information about the F# track, including how to get help if you're having trouble, please visit the exercism.io [F# language page](http://exercism.io/languages/fsharp/resources). ## Source Hyperphysics [http://hyperphysics.phy-astr.gsu.edu/hbase/Organic/transcription.html](http://hyperphysics.phy-astr.gsu.edu/hbase/Organic/transcription.html)