<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2010) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2010) (Learn how and when to remove this template message) </Td> </Tr> <P> S phase (synthesis phase) is the part of the cell cycle in which DNA is replicated, occurring between G phase and G phase . Precise and accurate DNA replication is necessary to prevent genetic abnormalities which often lead to cell death or disease . Due to the importance, the regulatory pathways that govern this event in eukaryotes are highly conserved . This conservation makes the study of S - phase in model organisms such as Xenopus laevis embryos and budding yeast relevant to higher organisms . </P>

Which of the following occurs during the s phase of interphase