What do human cells need to grow and reproduce?

Human cells require several key processes to grow and reproduce effectively. Among these, the ability to replicate DNA is crucial because it ensures that when cells divide, they accurately pass on their genetic information to the daughter cells. This replication of DNA is the foundation for cellular division, enabling growth and the development of tissues.

While the ability to absorb nutrients, eliminate waste, and absorb oxygen are all important for the overall health and function of cells, they do not directly contribute to the process of cell growth and reproduction in the same way that DNA replication does. Nutrients provide energy and building blocks for cellular processes, waste elimination helps maintain cellular health, and oxygen is essential for cellular respiration. However, without the fundamental process of DNA replication, cells cannot successfully complete the division necessary for growth and reproduction. Thus, the correct focus on DNA replication highlights its critical role in the life cycle of cells.