There are more pre-med experts in the pre-med forum section, but the usual recommendation is to take an additional upper level biology course covering similar topics at a more advanced level, rather than taking the college course on the same material and having to mark “repeat” on the medical school application for the college course. This is probably not too much of an issue for you since you say that you will major in biology.
However, if you transfer to a different college, you may be forced to repeat your IB credit if your new college does not accept it in substitution for its own introductory biology course.