Hey, not currently doing the course (but it's my first choice for next year, well that and business as a dual degree), I think Biology and probably Chemistry would be beneficial, but if you haven't done any science I would recommend doing a biology bridging course, not sure if UTS has one or not, if not then do a bridging course at another uni before the semester starts, or online. You should be fine, from what I can gather from the course handbook the biology subjects are just extensions from the HSC Biology so you might find it difficult.