Weird seeing this. I was a natural at biology didn't even have to study and aced any exam to the point where kids would let me cheat on other exams so long as they cheat off of me on biology (not proud if it now but "everybody did it then").

I didn't pursue anything related to it because it just wasn't my personality. I hated hospitals or touching body parts or even talking to random people. And I hated school with a deep passion (still do long after) can't do much with just 4yr degree in biology might as well lock me up in prison in solitary.

Goes to show, you don't need to be natural at something to do well in it and even if you are a natural doesn't mean it's your thing. There are very few things you can't make yourself learn and be good at by compensating for talent with effort and perseverance.