Suppose you discover a new form of nucleic acid, XNA. Like DNA, it is double-stranded. You are interested in its mode of replication, so you radio-label parental XNA and then allow that XNA to replicate in the presence of unlabeled bases. After one round of replication, you find the parental XNA intact with both strands labeled and the new XNA with both strands unlabeled. What can be inferred from these results? Like DNA, XNA replicates conservatively.
Unlike DNA, XNA replicates conservatively.
Like DNA, XNA replicates semiconservatively.
Unlike DNA, XNA replicates semiconservatively.