This is a large collection of multiple choice questions on the eukaryotes, prokaryotes, and viruses. Topics covered include an overview of eukaryotes, protozoa, fungi, algae, water molds, classification of prokaryotes, Domain Bacteria, Domain Archaea, characteristics of viruses, classification, replication, viruses and cancer, culturing, viroids and prions. These questions are suitable for students enrolled in Microbiology, Introduction to Microbiology or Basic Microbiology.