The experiments of Arthur Kornberg, John Cairns, Matt Meselson, Frank Stahl, Reiji Okazaki, and Tuneko Okazaki demonstrated that DNA replication in the intact chromosomes of prokaryotic cells was:
bidirectional, completely conservative, and completely continuous
unidirectional, semi-conservative, and completely continuous
bidirectional, semi-conservative, and semi-discontinuous
bidirectional, completely dispersive, and semi-discontinuous
unidirectional, semi-conservative, and completely discontinuous