i really really struggled with section one, but i think it was the hardest section. Its purely because of the quantity of information they give you in some questions, you really have to be good at dealing with data under pressure. I did ok in section two although for the recessive allelle question i put 25 and i believe now the answer is 33 percent. I also guessed the surds question which was annoying, i should have been able to do that. The cos theta question thingy i also guessed. And the circuit one was a guess. OH GOD I GUESSED LOADS!