Notice Medicine is an ever-changing science. As new research and clinical experience broaden our knowledge, changes in treatment and drug therapy are required. The authors and the publisher of this work have checked with sources believed to be reliable in their efforts to provide information that is complete and generally in accord with the standards accepted at the time of publication. However, in view of the possibility of human error or changes in medical sciences, neither the authors nor the publisher nor any other party who has been involved in the preparation or publication of this work warrants that the information contained herein is in every respect accurate or complete, and they disclaim all responsibility for any errors or omissions or for the results obtained from use of the information contained in this work. Readers are encouraged to confirm the information contained herein with other sources. For example and in particular, readers are advised to check the product information sheet included in the package of each drug they plan to administerto be certain that the information contained in this work is accurate and that changes have not been made in the recommended dose or in the contraindications for administration. This recommendation is of particular importance in connectionwith new or infrequently used drugs. Preface The new edition of Biochemistry and Genetics: PreTestTM Self-Assessment and Review is based in part on earlier editions prepared by Golder N. Wilson, MD, PhD, Department of Pediatrics, Texas Tech University Health Sciences Center; Cheryl Ingram-Smith, PhD; Kerry S. Smith, PhD, Department of Genetics, Biochemistry, and Life Science Studies Clemson University Clemson, South Carolina; and Francis J. Chlapowski, PhD, Department of Biochemistry and Molecular Biology, University of Massachusetts Medical School. All questions are in single-best-answer format and a large number of them are analogous to those of the United States Medical Licensing Examination (USMLE), Step 1. Questions are updated to the most current editions of leading textbooks in medical biochemistry and medical genetics.