Where is eukaryotic DNA primarily located in the cell?

• A. Cytoplasm
• B. Nucleus
• C. Ribosome
• D. Mitochondria

Answer: (B)

In eukaryotic cells, most DNA is housed in the nucleus, a membrane-bound compartment that houses the chromosomes made of linear DNA associated with histone proteins. This setup protects genetic material and coordinates gene expression, replication, and repair by keeping transcription and RNA processing separate from cytoplasmic processes like translation. There is DNA in mitochondria as well, but it represents a small, separate genome that encodes only a subset of mitochondrial proteins and is not the main repository of the genome. The cytoplasm contains organelles and machinery for protein synthesis, but it does not serve as the primary storage site for genetic material. So the nucleus is the primary location of eukaryotic DNA.