Preparing for the United States Medical Licensing Exam Step 1, 2 or 3 is difficult, time-consuming, and anxiety-provoking. Knowing the information cold is the best way to ace the test. Although the test is multiple-choice, studies have shown that being able to answer unkeyed questions shows a higher level of mastery of the material. Try these to see how you are doing…
Question 1
A mildly mentally handicapped 31 year old male is noted to have 10 café-au-lait spots greater than 2 cm, pigmented iris hamartomas, and multiple peripheral nerve Schwannomas. What enzyme is lacking?