Where does DNA replication occur in a eukaryotic cell?

Where does DNA replication occur in a eukaryotic cell?

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

Answer: (A)

In eukaryotic cells, the genetic material is kept in the nucleus and replication happens there. The DNA is organized as chromatin inside the nuclear envelope, and the replication machinery—DNA polymerases, helicases, primases, ligases, and other factors—operates within that nuclear environment during the S phase to copy the genome. While mitochondria contain their own circular DNA and duplicate inside the mitochondria, the bulk of the cell’s genome is replicated in the nucleus. The cytoplasm houses other processes like translation, and ribosomes themselves are not involved in DNA replication.

In eukaryotic cells, the genetic material is kept in the nucleus and replication happens there. The DNA is organized as chromatin inside the nuclear envelope, and the replication machinery—DNA polymerases, helicases, primases, ligases, and other factors—operates within that nuclear environment during the S phase to copy the genome. While mitochondria contain their own circular DNA and duplicate inside the mitochondria, the bulk of the cell’s genome is replicated in the nucleus. The cytoplasm houses other processes like translation, and ribosomes themselves are not involved in DNA replication.