Is it possible to mark a question in order to be notified of the answers? The aim here is only to have a quick way to be informed of the answers, without taking any kind of action on the question.
I think the favorite feature does what you are looking for, or as close as SE offers.
After clicking the little star under the vote buttons on any question, it will get added to your favorite list. Any time anything changes, or a new answer gets added a little blue box with how many changes will show up there.
Then just sort your favorite list by "activity", and the most recent changed question will be at the top.
If you are into RSS, then you can click the link at the bottom of the page on any question. That feed will include, and update for any answers.