The most important exams are GRE and TOEFL/IELTS for Masters.

For Bachelors SAT/ACT and TOEFL/IELTS.

Hello
MCAT is entrance exam to study abroad in medical education.
Conducted by the AAMC, the Medical College Admission Test (MCAT) is accepted for admission mainly to medical institutes in the US, Canada and some other countries. The syllabus and pattern for this test is set in a way to test an aspirant's awareness in scientific concepts and principles. You can check the MCAT sample paper for more insight into the pattern of the test.
Besides medical institutes, some health professions and graduate schools accept MCAT scores as part of their selection procedure. Aspirants planning to register for health professional institutes can take the MCAT.
MCAT centres are located all around the world for the convenience of the test takers. However, the confirmation of the test date depends on the availability of seats as on that date.
With more than 85000 students sitting for the exam every year, MCAT evaluates a candidate on three yardsticks, namely, Physical Sciences, Verbal Reasoning and Biological Sciences.
Hope this information is helpful
Good luck!