The worst exam. Some of the questions are so poorly written i think.
Like you said before, the dilution one? was that meant to be a minimum dilute, coz i just randomly guess checked and put down 40 coz that gave a reasonable answer.
Also that bloody amino acid one was a jib. Spent like 10 minutes thinking there was some way to determine whether or not it could be lysine or arganine on the chromtography lol, then just wrote both down and got full marks for it. The isoeletric points threw me a fair bit though too. As you have all said though, full of questions (especially in MC) purposely set out to trick you eg. fatty acid one which i still have no clue about, indicator etc.
btw kyzoo and stone i thought that the -COOH are identical hydrogen enviroments..... but your answer looks pretty correct ot me also
Overall easily the hardest, most dog exam ive done got 65/75