Here's why:

* Nucleus: The nucleus is the control center of the cell and houses the majority of the cell's DNA in the form of chromosomes.

* Mitochondria: While mitochondria have their own DNA (mtDNA), it only comprises a small fraction of the cell's total DNA.

* Cytoplasm: The cytoplasm is the gel-like substance that fills the cell, but it doesn't contain the majority of the cell's DNA.

Let me know if you have any other questions!