MB 230 Midterm 1 - Oregon State Questions With Complete Solutions

Which two groups of microorganisms are prokaryotic? correct answer: Bacteria and Archaea which measurements are typically used when measuring a virus correct answer: nanometer Which measurement is used when measuring bacteria correct answer: micrometer what played the biggest role in disproving spontaneous generation? correct answer: the swan neck flask which two feature do all microorganisms have in common correct answer: microscopic and relatively simple which group of microbes contains members that are moving (members that are never alive) correct answer: A cellular entities Robert Koch developed four postulates to validate whether a specific microbe causes a specific disease. -- what is incorrect/ inconsistent with the postulates correct answer: the microorganism must be found in all organisms suffering from the disease as well as some healthy organisms The abbreviation for the four RNA nucleotide are: correct answer: G, C, A, U Which of the scientific theory did the experimental work by Hershey Chase set out to test? correct answer: DNA carries cells heritable information A halophile is an organism that correct answer: prefers a very salty environment The Hershey Chase experiment used radioactive bacteria-phage` to demonstrate which of the following? correct answer: DNA, but not protein enters the bacteria during a viral infection The process underlying the SECOND step of the central dogma is called correct answer: translation the process underlying the FIRST step of the central dogma is called correct answer: transcription Which of the following is NOT a limitation of Koch's postulates? correct answer: some microbes are prokaryotic and can from spores A microbe that prefers the temperature of the human body (37 c) is called correct answer: mesophile In the test tube media ( where you can find a high concentration of oxygen at the top and at the bottom) where will you find growth of a faculatitve anaerobe correct answer: most growth will be at the top of the tube with the high oxygen, but there will be some growth at the bottom of the tube correct answer: Catabolic / Anabolic which of the following organisms likely lacks enzymes like catalase and superoxide dismutase? correct answer: Obligate anaerobes in what environment would you be most likely to find a psychrophile? correct answer: in sea ice The four major groups of organic macromolecules associated