Need help with DNA replication questions for microbiology

During DNA replication,(Points : 4)the leading and lagging strands are both synthesized continuously in the 5  3 direction.DNA helicase is responsible for bringing nucleotides to the site of replication.eukaryotes replicate all their DNA from a single origin.DNA may be methylated through the addition of a methyl group.cytosine pairs up with guanine and adenine pairs up with uracil.