Microbiology Exam Questions with 100% Correct Answers | Verified | Updated

Microbiology Exam Questions with 100% Correct Answers | Verified | Updated What is the concept of spontaneous generation? - answerliving organisms could develop from nonliving or decomposing matter Who challenged the concept of spontaneous generation by showing that maggots on decaying meat came from flies, not from the meat itself? - answerFrancesco Redi Who showed that mutton broth boiled in flasks and then sealed could still develop microorganisms, which supported the theory of spontaneous generation? - answerJohn Needham Who showed that flasks sealed and then boiled had no growth of microorganisms? - answerLazzaro Spallanzani Who proposed that air carried germs? - answerSpallanzani Who disproved the theory of spontaneous generation? - answerLouis Pasteur Who demonstrated that dust carried microbes and proved evidence for the existence of heat- resistant forms of bacteria? - answerJohn Tyndall Who showed that a silkworm disease was caused by a fungus? - answerAgostino Bassi Who demonstrated that the Great Potato Blight was caused by a water mold? - answerM. J. Berkely Who showed that the pebrine disease of silkworms was caused by a protozoan parasite? - answerLouis Pasteur Who developed a system of surgery designed to prevent microorganisms from entering wounds? - answerJohn Lister Who transformed the practice of surgery? - answerJohn Lister Who established the relationship between Bacillus anthracis and anthrax? - answerRobert Koch What are the Koch Postulates? - answer1.The microorganisms must be present in every case of the disease but absent from healthy individuals 2.The suspected microorganisms must be isolated and grown in pure culture 3. The same disease must result when the isolated microorganism is inoculated into a healthy host 4. The same microorganism must be isolated again from the diseased host Limitations of Koch's Postulates - answer-Some organisms cannot be grown in pure culture -Using humans in completing the postulates is unethical -Molecular and genetic evidence may replace What vaccination did Edward Jenner make? - answersmallpox vaccination What vaccinations did Pasteur produce? - answerchicken cholera, rabies and anthrax Who induced formation of dipped toxin-antitoxins rabbits - answerEmil von Behring and Shibasaburo Kitasato Who showed that the silkworm disease was caused by fungus? - answerBassi Who demonstrated that the Great Potato Blight of Ireland was caused by a water mold? - answerM.J. Berkeley Who showed that the perbrine disease of silkworms was caused by a protozoan parasite? - answerLouis Pasteur A simple morphology and lack a true membrane-delimited nucleus - answerprokaryotes What is a morphologically complex and has a membrane-enclosed nucleus? - answerEucaryotes What let to the discovery of viruses as disease causing agents? - answerbacterial filter that removed bacteria and larger microbes (Charles Chamberland) The five kingdom classification scheme is - answerthe Monera or Procaryotae, Protista, Fungi, Animalia, and Plantae What are ribozymes? - answerRNA molecules that form peptide bonds and perform cellular work and replication The three domain scheme is - answerBacteria, Archaea, and Eucarya The three domain scheme is based on? - answera comparaison of ribosomal RNA The earliest cells may have been - answerRNA surrounded by liposomes What are the three bacterial morphology? - answer-bacillus (little rod) -coccus (grain or berry) -spirillum (coiled or helical) What are the types of light microscopes? - answer-bright-field microscope -dark-field microscope -phase-contrast microscope -fluorescence microscopes What is a measure of how greatly a substance slows the velocity of light? - answerRefractive index The direction and magnitude of bending light in a microscope is determined by the _____ - answerrefractive indexes of the two media forming the interface Which microscope produces a dark image against a brighter background? - answerthe bright-field microscope What is the product of the magnifications of the ocular lens and the objective lens? - answerthe total magnification What is the total magnification of the bright field, dark field, and phase-contrast microscopes? - answer2000x What is the total resolution of the bright fi