The Medical Laboratory Technician (Substance Abuse) Passbook(R) prepares you for your test by allowing you to take practice exams in the subjects you need to study. It provides hundreds of questions and answers in the areas that will likely be covered on your upcoming exam, including but not limited to; Laboratory principles, practices and terminology; Basic principles of biology, chemistry, and general science; Arithmetic and algebraic reasoning; Analysis for drugs of abuse; and more.