**Core Concept**
Okazaki fragments are short, discontinuous DNA segments synthesized in the lagging strand during DNA replication. This process is essential for maintaining the integrity of the genome, as DNA polymerase can only extend DNA strands in a 5' to 3' direction. Okazaki fragments are subsequently joined together by DNA ligase to form a continuous strand.

**Why the Correct Answer is Right**
During DNA replication, the leading strand is synthesized continuously in a 5' to 3' direction by DNA polymerase. However, the lagging strand is synthesized discontinuously in short, 100-200 nucleotide-long fragments called Okazaki fragments. This is because DNA polymerase can only extend DNA strands in a 5' to 3' direction, and the lagging strand template is oriented in the opposite direction. Each Okazaki fragment is initiated with an RNA primer, which is later removed and replaced with DNA.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Okazaki fragments are not formed during DNA repair. While DNA repair mechanisms do involve the synthesis of new DNA strands, Okazaki fragments are a specific feature of DNA replication.
* **Option B:** This option is incorrect because telomeres are repetitive DNA sequences located at the ends of chromosomes, protecting them from degradation. Telomeres are not related to the formation of Okazaki fragments.
* **Option C:** This option is incorrect because DNA replication is the process during which Okazaki fragments are formed. DNA replication is the process by which a cell makes an exact copy of its DNA before cell division.

**Clinical Pearl / High-Yield Fact**
Okazaki fragments are an essential aspect of DNA replication, and their proper formation is crucial for maintaining genome stability. Understanding the process of DNA replication and the role of Okazaki fragments is vital for medical students and professionals.

**Correct Answer:** D