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FREE BIOLOGY AND STUDY GAMES ABOUT MBIO 2305
EXAM 1
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -76 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Robert Koch won the Nobel Prize for his contribution to medical bacteriology regarding
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Mycobacterium tuberculosis Question 2: What is the structure in prokaryotes that performs the same function as mitochondria in eukaryotes?
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Cell membrane Question 3: Manuel identified a microbe that is responsible for an unexplained respiratory illness in lab mice. He found the culprit in 14 ill mice, and he produced a pure culture of the microbe in the lab. He hasn't yet received permission from the board of ethics t
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Postulates #1 and #2 only
Question 4: Fluorescence microscopy using labeled antibodies is referred to as
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Iummunofluorescene
Question 5: _______ are iron-scavenging molecules secreted by bacteria.
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Siderophores Question 6: The ________ microscope relies on the principle of interference to produce images of the specimen without staining or damaging it.
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Phase-contrast Question 7: The capsule polysaccharides form a slippery mucous layer that inhibits
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phagocytosis Question 8: All the following are true about prokaryotic outer membranes EXCEPT that they
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are lipid bilayers composed of identical phospholipids Question 9: The lipopolysaccharide of the outer membrane is of medical importance because it acts as a(n)
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endotoxin Question 10: All of the following statements apply to scanning electron microscopy EXCEPT:
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The embedded specimen is cut into thin sections with a microtome Question 11: The X-ray diffraction studies by which of the following scientists concluded that DNA was a double helix?
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Rosalind Franklin
Question 12: Which of the following statements regarding the phosphotransferase system (PTS) is(are) TRUE?
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The system has a modular design that accommodates different substrates.The substrate being transported is altered during passage into the cell.Question 13: Which of these groups are considered to be microbes, but NOT considered to be cells?
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Viruses
Question 14: Which of the following statements about microbes is TRUE?
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Choose this answer if all of the above are false.Question 15: Which commonly used microbial classification advancement led to the tree proposed by Carl Woese?
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16s rRNA sequencing Question 16: In response to starvation conditions, ______ can form fruiting bodies comprised of about 100,000 cells.
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Myxococcus
Question 17: Which of the following microbes is an example of an endosymbiont?
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Both
- and
- are correct.
Question 18: Viruses are
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noncellular particles that take over the metabolism of a cell to generate more virus particles
Question 19: Which of the following uses preformed organic molecules for both carbon and energy?
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Chemoheterotroph Question 20: Your team recently discovered a new species of microbe living in the Bonneville Salt Flats of Utah. The single-celled organism lacks a nucleus, and its cell walls are not composed of peptidoglycan. In which of the following domains would you classify this
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Archaea
Question 21: All of the following are components of peptidoglycan EXCEPT
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lipopolysaccharide Question 22: Which of the following microscopes exposes specimens to a specific wavelength and forms an image with the light emitted at a longer wavelength?
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Fluorescence microscope Question 23: The hopanoids in bacteria are equivalent to the ______ in eukaryotes.
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Sterols Question 24: Which of the following is found in the cell wall of a Gram-positive bacterium but NOT in that of a Gram-negative bacterium?
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Teichoic acids Question 25: Which of the following scientists did NOT contribute to discovering the identity of or the structure of genetic material?
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Lynn Margulis
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