Which of the Following is TRUE

Question

Which of the following is TRUE?
A)Viruses that infect humans never infect other animals.
B)All viruses can only attack one type of cell.
C)Each virus attaches to a specific receptor site on its target cells.
D)Viruses that infect birds do not infect humans.
E)All of the above.

Accepted Answer

This statement is true. Each virus has specific surface proteins that bind to specific receptor sites on the host cell, and these interactions determine which cells the virus can infect.