Multiple substitutions with a single regular expression in perl

Question

Say I have the following in perl:

my $string;
$string =~ s/ /\\\\ /g;
$string =~ s/\'/\\\\\'/g;
$string =~ s/`/\\\\`/g;

Can the above substitut

Answer 1

$string =~ s/([ '`])/\\$1/g;

Uses a character class [ '`] to match one of space, ' or ` and uses brackets () to remember the matched character. $1 is then used to include the remembered character in the replacement.