A bacteriophage is a virus which infects bacteria. In particular, the bacteriophage is a virus which infects E.Coli, a bacteria that has been used extensively for molecular biology research. Mind Blown: Real Image of bacteriophage (a virus) via electron microscope.
AP Biology Exam Tips The following strategies for answering the free-response questions will help you on exam day. Before beginning to solve the free-response questions, it is a good idea to read through all the questions to determine which ones you feel most prepared to answer.