HESI A2

Biology

HESI A2 Biology is one of the core subjects on the Health Education Systems Incorporated Admissions Assessment, and this page is built to help you master every concept tested on it. From cell structure and function to genetics, photosynthesis, and basic ecology, the topics covered here form the scientific foundation nursing and allied health programs expect you to walk in with on test day. Whether you are a pre-nursing student preparing for your first admissions attempt or retaking the exam to strengthen your application, the material here meets you where you are. The content is organized around the biology concepts that appear most consistently on the HESI A2. You will work through cell biology, DNA and protein synthesis, biological classification, and the basics of human physiology as it connects to broader life science. Each topic is broken into focused, digestible pieces so you can build understanding step by step rather than trying to memorize a textbook the night before your exam. The best way to lock in what you study is to test yourself right away. Start a practice session on any topic and get immediate feedback on what you know and where you still have gaps. Use that information to guide your next study block, return to tricky concepts, and build real confidence before you sit for the actual assessment. Consistent, targeted practice is what turns shaky familiarity into solid knowledge — and solid knowledge is what gets you into the nursing program you are working toward.