I disagree with my good friend Adam.
I would NOT take basic science courses, particularly those that are scrutinized by admissions counselors and crucial to the MCAT at a community college.
Admissions counselors may look disfavorably on courses that are offered at community colleges.
I was lucky when I took Physics during the summer...I took it at UCONN. If you can take the same courses at a reputable university, then do so.
Biology, Chemistry, Physics, Biochemistry, Organic Chemistry...I would take all of these at your primary institution or a reputable university.
Other courses (some "sciences"): Psyhology, Sociology, Microbiology, etc...courses that are not taken by everyone and not scrutinized as highly, you can do OK with a community college.
Again, try to take the med school REQUIRED courses at another place, rather than the community college.
Good luck to you.