“ Chloramphenicol also inhibited all three processes; the inhibition of protein and RNA synthesis was reversed by glucose , but the inhibition of DNA synthesis was slightly greater in the presence of glucose.”
“The results are consistent with the possibility that chloramphenicol inhibits DNA synthesis in whole cells in the presence of glucose because the antibiotic undergoes metabolism, possibly reduction, in cells, and that a p-nitro group is important for this effect.”