Here's a breakdown:
* Introns: These are segments of DNA (and their corresponding RNA transcripts) that are removed during RNA processing (splicing). They don't code for proteins, hence the term "non-coding."
* Exons: These are the remaining segments of RNA that are spliced together and actually code for proteins.
Think of it like this: imagine you have a recipe with instructions and a bunch of unnecessary ingredients listed. The instructions are like the exons, and the unnecessary ingredients are like the introns. You need to remove the introns (unnecessary ingredients) to get the final, working recipe (protein).