What was the only conclusion that John Cairns could draw from his 1963 paper "The bacterial chromosome and its manner of replication as seen by autoradiography" ? Replication in E. coli is bidirectional Replication in E. coli is discontinuous E. coli has a circular chromosome E. coli has a single origin of replication

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Viral Replication

The virus is acellular and considered non-living outside the host cell. The replication of the virus occurs only inside the living cells. Only a few genes are present in the smallest virus, whereas many genes are present in the largest virus. These genes encode specific viral proteins.