Lab Corner on Instagram‎: "DNA replication is the process by which a cell makes an exact copy of its DNA before cell division. • Occurs in the nucleus (in eukaryotic cells) • Happens during the S phase of the cell cycle • It is semi-conservative (each new DNA has one old strand + one new strand) Main steps: 1️⃣ Unwinding – DNA helicase opens the double helix 2️⃣ Base pairing – Free nucleotides pair with exposed bases 3️⃣ Elongation – DNA polymerase builds the new strand (5′ → 3′) 4️⃣ Joining – D