DNA is made up of tiny units called nucleotides. Each nucleotide has three parts:

1. A phosphate group
2. A sugar
3. A nitrogen base

Challenges:

1. Complicated Shape: The way nucleotides fit together in a double helix can be hard to understand.
2. Copying Problems: When DNA copies itself, mistakes can happen, which can cause mutations.

Ways to Help:

• Using pictures or models can make it easier to understand how DNA is built.
• Learning tools and resources can help people practice how DNA copies itself, making it clearer and easier to understand.