Statement: One DNA molecule becomes two identical ones as a result of DNA replication.

Explanation:
DNA replication is a process that occurs during the cell cycle and is essential for the transmission of genetic information from one generation to the next. It is the process by which DNA makes an exact copy of itself.

Key Points:
1. Importance of DNA replication: DNA replication ensures that each new cell receives a complete set of genetic material that is identical to the parent cell. This is crucial for growth, development, and the ability of an organism to reproduce.

2. Semi-conservative replication: DNA replication is a semi-conservative process, meaning that each new DNA molecule consists of one original strand and one newly synthesized strand. This ensures that the genetic information is preserved and passed on accurately.

3. Enzymes involved: Several enzymes are involved in DNA replication, including DNA helicase, DNA polymerase, and DNA ligase. DNA helicase unwinds the double helix structure of the DNA molecule, creating a replication fork. DNA polymerase adds complementary nucleotides to the newly synthesized strand, using the original strand as a template. DNA ligase seals any gaps in the DNA molecule, ensuring its integrity.

4. Replication direction: DNA replication occurs in a bidirectional manner from a specific origin of replication. The replication forks move in opposite directions, resulting in the synthesis of two new DNA molecules.

5. Complementary base pairing: DNA replication follows the principle of complementary base pairing, where adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). This ensures that the sequence of nucleotides in the newly synthesized DNA strand is complementary to the original strand.

6. Accuracy of DNA replication: DNA replication is a highly accurate process, with an error rate of approximately one mistake per billion nucleotides. This is achieved through the proofreading ability of DNA polymerase, which can detect and correct errors during replication.

Conclusion:
The true statement about DNA replication is that one DNA molecule becomes two identical ones as a result of this process. This ensures the accurate transmission of genetic information and the preservation of genetic traits from one generation to the next.