I have 15 pages of notes and a basic understanding of Cell Structures. However, when it comes to the Quiz on Cell Structure I am falling short. In many instances, the Quiz questions do not reflect general knowledge of Cell Structure. E.G. The Endomembrane system is 50% of the cell but does not include (Mitochondria- Chloroplasts -Perroxisomes.) You will not find questions like this on the Quiz. I know the difference between the smooth ER and the rough ER and how they function. But you will not see a question that specifically addresses why they are different. Many cell structure topics are not even addressed in the Quiz. I value the instruction but the Quiz Section needs to be improved upon.