Most professional schools will require an entrance exam as a part of the application process.

For MD or DO medical school
MCAT: https://students-residents.aamc.org/applying-medical-school/taking-mcat-exam/about-mcat-exam/

For dental school
DAT: https://www.ada.org/en/education-careers/dental-admission-test

For physical therapy, occupational therapy, physician assistant, and veterinary medicine programs
GRE: https://www.ets.org/gre

For optometry programs
OAT: https://www.ada.org/en/oat

For pharmacy programs
PCAT: http://pcatweb.info/