Which enzyme joins the Okazaki fragments?

Explanation

**Step-by-Step Solution:**

1. **Understanding DNA Replication**: DNA replication occurs in a semi-conservative manner, where each new DNA molecule consists of one old (parental) strand and one newly synthesized strand.

2. **Separation of DNA Strands**: The enzyme responsible for separating the two strands of DNA during replication is called helicase.

3. **Synthesis of New Strands**: As the strands are separated, new strands are synthesized. The strand that is synthesized continuously is known as the leading strand.

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