Final answer:
The correct answer is d) Skin provides a barrier against pathogens. The other statements have misconceptions, as viral replication varies with the virus, the humoral immune response involves B cells and antibodies, and interferons target viral infections.
Step-by-step explanation:
The correct statement is d) Skin provides a barrier against pathogens. This is true because the skin acts as a physical barrier, preventing pathogens from entering the body. Also, it is important to clarify some misconceptions from the other choices. Viral replication can occur in both the cytoplasm and nucleus, depending on the virus type, but not all viruses replicate in the cytoplasm exclusively. The humoral immune response involves B cells and the production of antibodies, rather than T cells which are involved in the cell-mediated immune response. Interferons are indeed involved in defense against viral infections, not just bacterial infections, as they help to slow viral replication. Lastly, while glycoproteins do help viruses attach to host cells, not all information provided in statements about viruses and immune responses is accurate.