PreTest is the medical student's most dynamic weapon for acing the USMLE Step 1. Great for course review and exams, too! Biochemistry & Genetics PreTest asks the right questions so you'll know the right answers. Open it and start learning what's on the test. PreTest is the closest thing you can get to seeing the test before you take it. This one-of-a-kind test prep guide helps you to: get to know material on course exams and the USMLE Step 1; practice with 500 clinically-oriented multiple-choice questions; review key facts for exam success; build confidence, skills, and knowledge. There are plenty of answers out there. But only PreTest delivers the right questions. It is student tested and reviewed Some questions on the USMLE seemed to have come right out of my PreTest! - A medical student who recently passed the USMLE Step 1.