Biology

ATI TEAS Science Biology is one of the most content-heavy sections you'll face on the TEAS, and this page is built to help you work through every concept it covers. From cell structure and function to genetics, heredity, and the basic principles of evolution, you'll find focused study material organized the way nursing programs actually test it. Whether you're sitting down with the TEAS for the first time or coming back to strengthen a weak spot, this page meets you where you are.

Biology questions on the TEAS tend to reward students who understand the "why" behind the concepts, not just the vocabulary. That means knowing how DNA replication connects to protein synthesis, how Mendelian inheritance plays out in a Punnett square, or how the cell cycle relates to normal and abnormal growth. This page walks through those connections in clear, straightforward language so the ideas stick — not just for test day, but for the science coursework and clinical reasoning you'll build on throughout nursing school.

This content is designed for pre-nursing students and anyone preparing to meet their program's TEAS admission requirement. Once you've reviewed the material, the best next step is to start a practice session and see which biology topics you've locked in and which ones still need work. Targeted practice is the fastest way to close those gaps and walk into your exam with real confidence.