following glycolysis and the krebs/tca cycle and before the electron transport chain and oxidative phosphorylation, the carbon skeleton of glucose has been broken down to co2. most of the energy from the original glucose at that point is in the form of

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

Ok, you asked the question and posted the answer on there. what do you need?