Final answer:
The incorrect statement is that interferon is produced by viruses to enhance viral replication; rather, interferon is a cytokine that cells produce to inhibit viral replication and modulate the immune response.
Step-by-step explanation:
The false statement is c. Interferon is produced by viruses to enhance viral replication. Interferons are cytokines produced by cells in response to viral infections; their role is not to enhance viral replication, but to inhibit it and modulate the immune response. They are a key component of the immune system's defenses against viruses.
Skeletal muscle contraction indeed helps in lymph flow, facilitating the movement of lymph through the lymphatic vessels. Intact skin acts as a formidable barrier to microbial entry, usually more effective than the mucous membranes. An allergen is indeed an antigen that can evoke an allergic reaction, and it is not an antibody. Transferrins are proteins that bind free iron in the serum, obstructing bacterial iron uptake which is essential for their growth.