Florida Biology EOC Practice Test 2026 - Free Biology End-of-Course Practice Questions and Study Guide

The nucleus is primarily responsible for storing and managing genetic information in the form of DNA. This genetic material is crucial for cell function, growth, and reproduction, as it contains the instructions needed for producing proteins and regulating cellular processes. While other substances like amino acids, carbohydrates, and phospholipids are important for various cellular functions and structures, they do not represent the main component of the nucleus. The significant role of the nucleus in housing most of the cell's genetic information confirms that this answer is accurate.