So on the Natural Science section. Do you need to go through all 40 bio questions to get to the Gen Chem questions. And after you finish ochem or genchem sections, can you go back to the Bio? Or does it give you the "end" screen which says what questions you skipped/marked after 40 bio questions and then again after gen chem and then again after ochem? Because thats how Kaplan tests are so just wondering. Thanks!