Emacs: query-replace, regular expression, reuse of search result

How do I combine something like query-replace with a regular expression search-and-replace that in part reuses the search result? In my case, how to transform > The programmers are "sort of" confident that the subroutines "load_students" and "compute_student_grade" are without bugs. into > The programmers are "sort of" confident that the subroutines \texttt{load_students} and \texttt{compute_student_grade} are without bugs. I could use two query-replace and then hammer yes and no, but it seems sluggish for a big document. Also, I thought about including the whitespace in the searches (one  " and one " , but that would not work in cases such as ... that's not the way to use "load_students", rather ... Is there built-in stuff for this or do you write Elisp code?