The OAT is a 4–1/2 hour exam that consists of fours sections, Survey of the Natural Sciences, Reading Comprehension, Physics, and Quantitative Reasoning.

OAT Sections

Survey of Natural Sciences

  • 100 Questions, 90 Minutes
  • Test knowledge of biology, General Chemistry, and Organic Chemistry
Reading Comprehension

  • 40 Questions, 3 Reading passages, 50 Minutes
  • Tests ability to read, comprehend, and analyze scientific text


  • 40 Questions, 50 Minutes
  • Test knowledge of vectors, magnetism, optics, rotational motion, and other topics

Quantitative Reasoning

  • 40 Questions, 45 Minutes
  • Tests ability to conduct algebraic and numeric calculations, understand probability, statistics, geometry, and trigonometry, and deconstruct word problems