The first semester exam notes established the golden standard for how to pursue biology as a study, and the second semester exam notes became merely a natural extension of what I already had begun. Most of the questions missing in the first semester exam notes are available in the appendix of the second semester exam notes.
Due to the ultimate lack of time during the first semester, I didn't have the resources to write 10 of the questions in the first semester exam notes. However, during the second semester I found the time I needed to finish writing most of the questions missing in the first semester exam notes. So if you've just started to study molecular cell biology, I would suggest you to download the second semester exam notes as well.