In what types of organisms do you find dna

In organisms called eukaryotes, DNA is found inside a special area of the cell called the nucleus. Because the cell is very small, and because organisms have many DNA molecules per cell, each DNA molecule must be tightly packaged. This packaged form of the DNA is called a chromosome

Explanation:

now i honestly do not know if this answer is correct, i looked all over the internet for answers and this is what i got. i hope it helps.

yes the answer is total mass in unchanged   : )