🧬ap biology review

Phosphorus

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

Phosphorus is a chemical element that plays a crucial role in the structure and function of living organisms. It's an essential component of DNA, RNA, ATP (adenosine triphosphate), and phospholipids.

Phosphorus Definition - AP Biology Key Term | Fiveable