In which direction is the leading strand synthesised during DNA synthesis?

Explanation

**Step-by-Step Solution:**

1. **Understanding DNA Synthesis**: DNA synthesis is a semi-conservative process where each strand of the original DNA molecule serves as a template for the formation of a new strand. This results in two identical DNA molecules from one original molecule.

2. **Role of DNA Polymerase**: The enzyme responsible for synthesizing new DNA strands is called DNA-dependent DNA polymerase. This enzyme has a specific property: it can only synthesize new DNA in a particular direction.

3. **Direction of Synthesis**: DNA polymerase synthesizes new strands in the 5' to 3' direction. This means that the new nucleotides are added to the 3' end of the growing strand, while the template strand must be oriented in the opposite direction (3' to 5').

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