Dna of a cell is organized into structures what are these called

Chromosomes the organized structures are chromosomes

 Chromosomes

Reason: Chromosomes are very important and we have them, animals have them, and even plants. They carry genetic information (or DNA) which helps with genes. Chromosomes also contain proteins and nucleotides. They go through two process : Mitosis, and meiosis. I'm sure you'll learn about this as you go through this unit. Also a heads up: You'll learn about the difference between meiosis and mitosis: Meiosis is about gametes cell (or sex cells), and mitosis is about somatic cells (or body cells). But don't worry , you'll get this and in high school, they will talk more deep about this unit. 

Hope this helps!!