DNA and RNA. Credit Gabriela Slizewska A bacteriophage, also known as a phage, is a virus that infects and replicates within bacteria and archaea. Like any other viruses, they are made up of nucleic acids encased in a protein coat (capsid). Although morphological appearance is one of the characteristics used to classify phages (Phage morphologies), … Continue reading Are Bacteriophages (Phages) DNA Or RNA Viruses?