Respuesta :

Smultronställe
The correct answer is DNA. 

Each chromosome is made up of DNA tightly coiled many times around proteins that support its structure :)
wiseowl2018

ANSWER:

         A chromosome is composed  of DNA

EXPLANATION:


In the nucleus of every cell, the DNA molecule is packaged within thread-like formations known as chromosomes. Each chromosome is composed up of DNA tightly looped many times around proteins termed histones that maintain its structure