What is Circular DNA?

Circular DNA is like a string that forms a loop instead of being straight.

Imagine you have a piece of string, and instead of holding it in your hand at both ends, you tie the two ends together to make a circle. That’s what circular DNA looks like, a single strand of genetic material that loops back on itself, forming a complete circle.

Most DNA is like a long, straight string with letters written on it. But in some cells, the DNA is shaped like a ring, just like a bracelet you wear every day. This kind of DNA is called circular DNA.

When a cell needs to use this circular DNA, it can "unzip" part of the ring and read the letters from there, just like how you might take apart a bracelet to find your favorite bead.

You might have heard of bacteria, tiny living things that are all around us. Many bacteria have circular DNA, which helps them grow and multiply quickly.

So, circular DNA is simply a looped version of the genetic instructions that help living things do their jobs!