Transcribing DNA Into RNA


We are introduced to the concept of RNA strings that are composed of an alphabet containing the letters ‘A’, ‘C’, ‘G’ and ‘U’.

Given a DNA string t we are asked to transcribe it to an RNA u by replacing all occurences of ‘T’ in t with ‘U’ in u.


Here I’m skipping reading from a file since we covered this in the previous exercise.

Python comes with a set of functions to modify strings. One such function is str.replace(old, new[, count]) which returns a copy of the string str with all occurences of old replaced by new.

We can trivially solve the exercise by calling this function on our input data:

print(data.replace('T', 'U'))