How do I transcribe a DNA Sequence to a RNA Sequence?

In BioRuby, DNA and RNA sequences are stored in the same Bio::Sequence::NA class just using different Alphabets, you can convert from DNA to RNA or RNA to DNA using the rna or dna methods, respectively.

#!/usr/bin/env ruby

require 'bio'

# make a DNA sequence

dna = Bio::Sequence::NA.new("atgccgaatcgtaa")

# transcribe it to RNA

rna = dna.rna

# just to prove it worked

puts dna # => "atgccgaatcgtaa"

puts rna # => "augccgaaucguaa"

# revert to the DNA again

puts rna.dna # => "atgccgaatcgtaa"