**Question:** Which enzyme synthesize Okazaki fragments?

**Core Concept:** Okazaki fragments are short DNA fragments that accumulate during the replication of DNA, particularly in the leading strand of DNA synthesis. These fragments are filled in and ligated to form a continuous DNA strand by a specific enzyme called DNA polymerase delta (Pol δ).

**Why the Correct Answer is Right:** Okazaki fragments are generated due to the discontinuous nature of DNA replication, where DNA polymerase adds nucleotides to the growing strand in a 5' to 3' direction. DNA polymerase delta (Pol δ) is responsible for synthesizing the lagging strand, which is the complementary strand to the leading strand. Pol δ is a processive enzyme, meaning it can add nucleotides continuously without dissociating from the DNA template strand.

**Why Each Wrong Option is Incorrect:**

A. DNA polymerase alpha (Pol α) is involved in the synthesis of the leading strand, not Okazaki fragments.
B. DNA polymerase beta (Pol β) is involved in the repair of DNA damage, not Okazaki fragments synthesis.
C. DNA polymerase gamma (Pol γ) is involved in the synthesis of mitochondrial DNA, not Okazaki fragments.
D. DNA polymerase epsilon (Pol ε) is involved in the synthesis of the lagging strand, but the correct answer is DNA polymerase delta (Pol δ).

**Clinical Pearl / High-Yield Fact:** Understanding Okazaki fragments and the enzymes involved in their synthesis is crucial for understanding DNA replication and the role of different DNA polymerases in various cellular processes. Knowledge of these enzymes can help in appreciating the importance of proofreading and repair activities of DNA polymerases in maintaining genomic integrity.

**Correct Answer:** C. DNA polymerase gamma (Pol γ) is involved in the synthesis of mitochondrial DNA, not Okazaki fragments. Okazaki fragments are synthesised by DNA polymerase delta (Pol δ) during DNA replication in the nucleus. DNA polymerase gamma is crucial for DNA replication in mitochondria, which are organelles found in eukaryotic cells and are responsible for generating energy through the process of oxidative phosphorylation. Pol γ is responsible for synthesizing mitochondrial DNA, ensuring its replication during cell division.