Here is a basic set of courses that is commonly accepted as basic medical school requirements that will be considered by nearly every school:
Biology: Two semesters or one year with lab. At least two advanced courses in the biological sciences are strongly recommended as preparation for medical school.
General Chemistry: Two semesters or one year with lab. It is recommended that these courses be taken in the freshman year since they are prerequisites for organic chemistry.
Organic Chemistry: Two semesters or one year with lab. It is recommended that these courses be taken in the sophomore year so that they will be completed by the time of the April Medical College Admissions Test (MCAT) in the junior year.
Biochemistry: One semester is required by many medical schools and highly recommended by others.
Physics: Two semesters or one year with lab.
Mathematics: At least two semesters of college-level mathematics; one semester of calculus is recommended. Some medical schools stipulate additional calculus courses.
English: At least two semesters or one year. Some medical schools require three courses in English with emphasis on composition.
Additional Course Recommendations: Immunology, Genetics, Microbiology, Animal Physiology, Comparative Vertebrate Anatomy, Statistics, Psychology, Additional Social Sciences or Humanities courses.