This information is usually available on school's website. here is a sample from Loma Linda:
"Pre–requisites must be taken in the U.S.
Science coursework completed at a four year school is preferred.
A minimum of 96 semester or 144 quarter units are required from an accredited school.
A grade of "C" or higher is required to meet LLUSD requirements.
Science sequences must be completed within five (5) years of admission.
A science GPA of 3.3 or higher is recommended.
DAT scores of 19 or higher are recommended."