Final answer:
DNA provides instructions for building proteins, producing energy, and cell division.
Step-by-step explanation:
The DNA code in the cell provides cellular instructions for: a) Building proteins, b) Producing energy, c) Cell division.
DNA contains the information necessary for the cell to build proteins, which are essential for the structure and functions of the cell. Proteins include structural components of the cell and enzymes that speed up biochemical reactions. The genome of a cell's DNA determines its full complement of proteins, and gene expression translates the genetic information into protein construction.