Many med schools view pre-reqs taken at a CC as being less competitive/challenging than coursework taken at 4 year college. Most med schools require or strongly recommend that all CC classes be supplemented with additional upper level coursework in the same department as the CC credits if one wants to be considered a competitive applicant for admission.
Also be aware, that unless your DE program is completed at a CC which has an articulation agreement with the 4 year college you transfer to, your credits may not be accepted as fulfilling graduation requirements for your major. This is especially true if you choose a private college.