Massachusetts MCAS Biology Test 2025 – 400 Free Practice Questions to Pass the Exam

The primary function of the nucleus in a cell is to house the cell's DNA. The nucleus is often referred to as the control center of the cell because it contains the genetic material that dictates cellular functions and the hereditary information passed from one generation to another. Within the nucleus, DNA is organized into chromosomes and is responsible for encoding the instructions necessary for the synthesis of proteins and the regulation of various cellular processes.

While other components of the cell are involved in energy production, protein synthesis, and cell division, it is the nucleus that specifically safeguards and manages the DNA, ensuring that the cell can appropriately respond to its environment and carry out essential life functions.