Define Okazaki fragments.

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Okazaki Fragments**: Okazaki fragments are short sequences of DNA that are synthesized during the replication of DNA.

2. **Context of DNA Replication**: DNA replication is a semi-discontinuous process, meaning that one strand is synthesized continuously while the other is synthesized in segments.

3. **Direction of Synthesis**: DNA strands are antiparallel, and replication occurs in the 5' to 3' direction. This means that the leading strand can be synthesized continuously in the same direction as the replication fork, while the lagging strand must be synthesized in the opposite direction.

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