CBSE Class 12 Biology Paper 3 Previous Year Question Paper 2025 is a helpful study resource for students preparing for the board examination. This paper enables students to understand the exam pattern, marking scheme, and type of questions asked by CBSE. It includes important chapters such as biotechnology, human health, ecology, and environmental studies. Practicing this paper strengthens conceptual understanding and improves answer-writing skills. Solving previous year question papers also helps students identify frequently asked questions, making revision more targeted and effective for scoring higher marks in the Class 12 Biology board exam.