Label/Color A A The 2 original strands The 2 new strands The hydrogen bond Circle a nucleotide Color the phosphate red Color the sugar green Questions C T G G 1.) What enzyme unzips the original strand? 2.) What enzyme assembles the new strand? 3.) What part of interphase does replication occur? Summary Why does DNA have to replicate before mitosis can start? T T G A C C T A T A G C A T C G C G