More than 1 mark or 1 line?! There is a difference because a one mark question can have about 3 lines. E.g. explain what hydrolysis means in terms of the complex polysaccharide Starch? (1 mark - 4 lines). I think that its okay for questions work more than 1 mark and more than 2 lines perhaps given to write). I don't think two lines would comfortably accomodate 2 points that can just be wound up into a 'succinct' sentence
That's my opinion though, and judging by your outstanding Bio result, I trust you haha 
Yeah that's a very good point! Didn't think about that, however I do remember questions like that and I still, although it may sound typical, kept it really short, and with dot points... But if you come across a question like your example and you panic due to the excess amount of lines, don't fret, sometimes it's just a coincidence that there are 3 or 4 lines.. And worst case scenario, just pump out like 4 good dot points related to the question, and pray that the answer is there.. Only do this as a last resort IMO, and remember that examiners tend to look at your first answer and disregard the rest, even if your first answer is wrong but your second is right.. But that only applies to basic 1 mark 1 line questions like "where are enzymes made"
Think that might sound a bit confusing, sorry, but I hope you get the gist of what I'm trying to say.
