Biol 3200 Ch 1 Exam Questions With Verified Answers Latest Update 2026

BIOL 3200 CH 1 EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE 2026 Which of the following best determines a microbe as the causative agent of a disease based on Koch's postulates? A. The microbe must be found in a healthy host B. The microbe must be observed under a microscope my multiple researchers C. The microbe use be isolated, cultured and then cause disease when reintroduced to a healthy host D. The microbe must be present in every geographic region affected by the disease - Answers The microbe must be isolated, cultured, and then cause disease when reintroduced to a healthy host Which statement best reflects the army adoption and dissemination of small pox inoculation technique - Answers Smallpox inoculation was first promoted in Europe by Lady Mary Montague aster witnessing its effects in Turkey. Inoculation also has been practiced in other African and middle eastern countries Which disease was one of the first to be targeted by a vaccine created by Louis Pasteur using attenuated strains - Answers Fowl cholera What does analysis of 16S rDNA sequences show? - Answers Archaea are classified separately from bacteria What kind of evidence has recently made it necessary to assign the prokaryotes to either of two different domains, rather than assigning all prokaryotes to the same kingdom? - Answers Small subunit rRNA gene sequence Which of the following evidences show taht mitochondria have evolved by endosymbiosis from early bacteria engulfed by pre-eukaryotes - Answers Mitochondria have their own DNA that resembles bacterial DNA, their own ribosomes with same size as bacterial ribosomes, and have a double membrane which is similar to gram negative back terminal cell membrane Which statement about the Domain Archaea is NOT accurate? - Answers No Archaea are adapted to water temp. Above the boiling point, no archaea can inhabit solutions that are nearly 30% salt, the genomes of archaea are unique, contacting no genes that originated within bacteria Compared to eukaryotes which of the following statements is TRUE to prokaryotes (both bacteria and archaea) - Answers Simpler morphological, but very diverse and complex metabolically What does analysis of the small subunit (16srDNA) sequence show - Answers Archaea are classified separately from bacteria Which of the following arguments support the classification of Archea as a distinct domain separate from bacteria and prokaryotes? - Answers Archaea have unique ribosomal RNA sequence that differs significantly from both bacteria and eukaryotes Which of the following best describes the challenges early taxonomists faced when classifying microorganisms - Answers Low resolution of light microscope, inability to define microbial species clearly Which interpretation best explains why these methane-producing, heat tolerant organisms were classified as Archaea rather than simply grouped with bacteria? - Answers Their SS rRNA gene sequences identified a distinct lineage with similarity to eukaryotes The following definition describes what level of taxonomic classification: a subdivision of biological classification composed of related organisms that share common characteristics and can interbreed - Answers Species