It actually doesn't matter which psych to take if you're going into molecular bio. Psych 1F03 is basically Psych 1X03 except in 1F03 you don't have tutorials where you do practice questions and iclickers and get participation marks. It's a lot of material in my opinion. Although they try to make it more application based, you still need to memorize all the concepts before you can start applying it. There are weekly quizzes worth 30% of your final grade. There is a quiz bank you can take a look at here:
https://sites.google.com/site/maceng....8.-PSYCH-1X03 Your exam is worth 60% of your final grade which is why you need to study. There are psych studies/experiments that you can take part in to lower the weighting of ur exam to 55%.