What is the role of DNA polymerase in the cell?

DNA polymerase plays a critical role in the process of DNA replication, where it is responsible for synthesizing new strands of DNA by adding nucleotides complementary to the existing template strand. During cell division, it ensures that each daughter cell receives an accurate and complete copy of the genetic material.

The enzyme works by catalyzing the formation of phosphodiester bonds between nucleotides, effectively building a new DNA strand. This action is vital for the maintenance and transmission of genetic information from one generation of cells to the next, thereby maintaining the integrity of the organism's genome.

In contrast, other processes mentioned in the choices involve different enzymes and functions. Building proteins is primarily the function of ribosomes and transfer RNA (tRNA), while transcribing RNA involves RNA polymerase during transcription. Storing genetic information refers to the role of DNA itself rather than an enzymatic function. Hence, the unique responsibility of DNA polymerase in copying DNA is what makes it the correct answer.