...And building upon Carp's fine solution, to preserve the readability of the "tick" mark, without dealing with the Oracle hassles of a tick mark, you can do the following:
UPDATE my_table
set name_col = replace(name_col,chr(39),chr(96)
where instr(name_col,chr(39)) > 0;
CHR(39) equals (') tick mark; CHR(96) equals (`) backward tick.