Have an Answer?
It depends on what you want to do after graduation and why you took the time off.
If you need the time off for medical or family reasons, then focus first and foremost on that.
If you are feeling burnt out, then taking a trip like Danny suggested is a great idea. If funds are limited you can always travel closer to home, you don't have to go to another country to discover yourself.
You can also consider looking into getting some experience in the field you are interested in through volunteering or a limited internship of some sort. This will give you something to put on your resume and it may inspire you to keep working and push through the burnout (if that is indeed what you are feeling).
Most importantly, use this time to take care of yourself. Sleep in, try new foods, take up a new hobby, try a new workout routine.
I hope this helps. Best of luck with everything!
Although you didn't say why you needed to take a year off, I am guessing that you are feeling burned out and just need a break from the studies. If so, a trip to a country that has always interested you might be just the thing to reset your mind and recover your energy.
-One word of caution: you might decide that molecular biology is not really how you wish to spend the rest of your working life, in which case be prepared for big changes that may be painful at first.