Question

why do chromosome contain DNA in the nucleus and give to role of nucleus in the cell​

Answer 1

The nucleus acts like a protective barrier for the genetic material. Because the genetic material contains all the “precious” information required by the cell to function

The main function of the cell nucleus is to control gene expression and mediate the replication of DNA during the cell cycle. The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material