Why is DNA replication necessary in living organisms?

• A. It repairs DNA damage by replacing RNA primers with DNA nucleotides.
• B. It allows cells to convert DNA into RNA to begin protein synthesis.
• C. It ensures that each daughter cell receives a complete and identical copy of the genome during cell division.
• D. It increases the total number of chromosomes in a cell to promote genetic diversity.

Answer: (C)

Verified step by step guidance

1. Understand the fundamental purpose of DNA replication: it is the process by which a cell makes an exact copy of its DNA.
2. Recognize that during cell division, each daughter cell must receive a full set of genetic information to function properly and maintain the organism's characteristics.
3. Note that DNA replication ensures the genome is duplicated accurately so that both daughter cells inherit identical genetic material.
4. Distinguish DNA replication from other processes such as transcription (DNA to RNA) and DNA repair mechanisms, which have different roles.
5. Conclude that the necessity of DNA replication lies in preserving genetic continuity across generations of cells, not in increasing chromosome number or converting DNA to RNA.