Why must DNA be replicated?

DNA must be replicated to ensure that when a cell divides, each new cell receives an identical copy of the genetic material. This process is critical for growth, development, and repair of tissues in multicellular organisms, as well as for reproduction in unicellular organisms.

During cell division, specifically mitosis and meiosis, the genetic information must be accurately duplicated so that daughter cells can function properly. If DNA replication did not occur, cells would have incomplete genetic information, which could lead to improper functioning or cell death. Thus, DNA replication is a fundamental process that supports the continuity of life by enabling cell division and the production of new cells that carry the same genetic information as the original cell.

The other options focus on aspects of DNA management or cellular function that are important but not the primary reason for replication. For instance, while DNA repair is crucial, it does not replace the necessity of DNA replication during cell division. Similarly, energy creation is handled through metabolic processes unrelated to DNA replication, and while removing mutations is important for maintaining genetic integrity, this is generally managed by repair mechanisms rather than the act of replication itself.