Which one of the following cell organelles contains DNA?

In eukaryotic cells, while the majority of genetic material is housed within the nucleus, specific organelles possess their own independent genetic systems. The mitochondrion is a double-membraned organelle responsible for generating chemical energy in the form of ATP [1]. Uniquely, mitochondria contain their own small, circular chromosomes, known as mitochondrial DNA (mtDNA), which is typically inherited maternally [2]. This DNA encodes for specific tRNAs, rRNAs, and proteins essential for the organelle's function. Other organelles mentioned, such as the Golgi apparatus, lysosomes, and endoplasmic reticulum, are involved in protein packaging, waste digestion, and synthesis respectively, but they do not contain their own DNA [2]. In plants, chloroplasts also contain DNA, but among the provided options, only the mitochondrion is a DNA-containing organelle [3].

Sources

1. [1] https://www.genome.gov/genetics-glossary/Mitochondria
2. [2] https://medlineplus.gov/download/genetics/understanding/basics.pdf
3. [3] https://www.ncbi.nlm.nih.gov/books/NBK9896/