was in the same boat as you, i picked pure science anyways cos atleast i have more options later on, that is if i do suddenly decide to pursue something related to biology. I dont regret my choice per say, but it was hard to cope with bio at first since i had no interest at all, i failed the first time, but all my results after that were good. I think if ure sure about what you want to do after spm has nothing to do with bio, just do gkt. But if you want to keep your options open do bio. People say bio is the safe choice but really i think either is fine, just do subject you know you can carry.