text: do viruses direct anabolic pathways of host cells?   once a viral dna is intergrated in the host's genome, viral genes can be expressed, which means that viral proteins will be produced (anabolism). so, may be not direct anabolism in the strictest sense that evry building up reaction is controlled by the viral dna, but they do direct the anabolism of molecules that are important for their survival once in the host.