Yes, it is possible. You are looking for qr in perlop (under Regexp Quote-Like Characters).

#!/usr/bin/perl
use strict;
use warnings;
my $text = 'Mary had a little lamb.'; # get your text from wherever
my $regex = 'it';                     # get your regex info from where
+ver
my $reg = qr/$regex/;                 # compile it
print $regex if $text =~ $reg;        # check for a match
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