I'm going to be entering 11th grade in July and I'm worried because I'm taking IB classes and in that I've got to drop one science and I don't really like physics but I'm not sure if it's really needed for doing a biochemistry major... if it isn't then I would like to go for bio and chem but i don't know if its a good idea...
As an IB student taking SL Physics myself, I can pretty conclusively say that IB Physics would be relatively useless in your field. Even if you intend to go into physical biochemistry, the IB Physics course is not calculus-based, which makes it pretty pointless in the long run. If you do need physics, you'll end up taking calculus-based physics in college whether or not you take algebra-based physics in high school. I would advise you to stick to bio and chem.
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As one who is also taking SL Physics currently, I would absolutely say not to take SL Physics. I regret taking the class because somehow I thought it would help me "think" in a different way, but since I'm wanting to be Business major, it's completely useless for my major. Don't take it unless you have a passion for it. It's also usually hard to find good IB Physics teachers.