$ vim 110301.pl
a
  1 use strict;
  2 use warnings;
  3 
  4 #The DNA
  5 my $DNA = 'ACGGGAGGACGGGAAAATTACTACGGCATTAGC';
  6 
  7 # Print the DNA onto the screen
  8 print "Here is  the starting DNA : \n\n";
  9 
 10 print"$DNA\n\n";
 11 
 12 #Transcribe the DNA to RNA by substituting all T's with U's.
 13 my $RNA = $DNA;
 14 
 15 $RNA =~ s/T/U/g;
 16 
 17 #Print the RNA onto the screen
 18 print "Here is the result of transcribing the DNA to RNA : \n\n";
 19 
 20 print"$RNA\n";
 21 
Esc
$ perl 110301.pl
Here is  the starting DNA : 
ACGGGAGGACGGGAAAATTACTACGGCATTAGC
Here is the result of transcribing the DNA to RNA : 
ACGGGAGGACGGGAAAAUUACUACGGCAUUAGC
