It’s like a storage where you store all the information about a living organism( what color are your eyes, skin, hair.. and it’s not just colors but every thing that makes your body work) and It’s inheredit from your parents it means that you can thank them for giving you all those body characteristics

Let me tell you more about It’s structure it is like a puzzle of 4 different colors (whit black red orange ) but only two colors can be vertically attached to each other (neutral colors with each other :white with black) and red to orange 

And horizontally it’s a randomized bound which makes a shape of a hélicoïde 🧬 those are called nucleic acid 

A:Adénosine : white

T:Thymine : black 

G:Guanine : red 

C:Cytosine : orange 

You can tell that A will bind with T and G with C

And now we figured out what NA In DNA refers to.

On the other hand D refers to desoxyribose 

Desoxy means no OH (hydroxyl meaning an atom of oxygen that is binded to an atom of hydrogen)

what’s the thing that haven’t a hydroxyl in here well it’s a ribose; it’s an ose. don’t worry you know it. it has just a different name.

You know glucose (sugar) right! well can you now imagine that ose is the father of glucose, well glucose’s sister is  ribose, that has a missing earring:a missing Hydroxyl unfortunately, but not that unfortunate for us because that’s what makes DNA more stable in the organism