Which of the following parts of a cell contain DNA?

The nucleus is the part of the cell that contains the majority of the cell's DNA. It serves as the control center of the cell, housing the genetic material that dictates cellular function, growth, and reproduction. In eukaryotic cells, the DNA within the nucleus is organized into structures called chromosomes. This organization is crucial for processes such as replication and transcription, allowing the cell to produce the necessary proteins for its functions.

While mitochondria also contain a small amount of DNA, known as mitochondrial DNA, it is primarily involved in the production of energy (ATP) through cellular respiration rather than serving as the main repository of genetic information for cellular functions. The cytoplasm is where many cellular processes occur and contains various organelles, but it does not house the genetic material. Ribosomes are responsible for protein synthesis but do not contain DNA. Therefore, the nucleus is the correct and primary location for DNA within the cell.