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Unformatted text preview: 2 2 Student: ___________________________________________________________________________ 1. The most ancient type of organisms on Earth originated: A. 7,200 years agoB. 2 million years agoC. 4,004 years agoD. 3.5 billion years agoE. 13 billion years ago 2. Because they differ from all other living organisms by lacking a discrete nucleus and many other cell inclusions, Bacteria and Archaea are considered to be: A. histrionicB. prokaryoticC. prophasicD. karyokiE. prophylactic 3. Which of the following is NOT true of horizontal (lateral) transfer of genetic information? A. transfers genes from parent to progenyB. is important for inferring phylogenyC. can produce large genetic changeD. occurs commonly in bacteriaE. increases genetic diversity 4. A protein that can move protons and other ions across a cellular membrane is called a: A. transferaseB. stileC. osmotic pumpD. proton pumpE. peristaltic pump 5. Archaea are resistant to damage by harsh conditions because their membrane lipids, unlike those of Bacteria and Eukaryota, have: A. proton pumpsB. cytoskeletonsC. transferasesD. sulfhydryl linkagesE. ether linkages 6. Archaea have very diverse environmental requirements and tolerances. From what you have learned about them, which among the following conditions or substances do ALL archaeans require for survival and reproduction? A. moderate salinityB. waterC. oxygenD. moderate temperatureE. moderate pH 7. Which of the following characteristics do not occur in ANY cyanobacterium? A. undergoes photosynthesisB. generates methaneC. poisons natural bodies of waterD. detects the Earth's magnetic fieldE. generates oxygen 8. The photosynthetic activity of cyanobacteria takes place in their: A. vibriosB. thylakoidsC. vesiclesD. piliE. mitochondria 9. There is great diversity of shape among microbes. Form is one of the ways different taxa can be distinguished. Which of the following shapes are not found among the microbes? A. curved shapesB. spiralsC. spheresD. octagonsE. rods 1 10. Which of the following is NOT a function of slimy mucilage in microbes? A. prevents desiccation (drying out)B. protects against ultraviolet radiationC. protects against the host's immune systemD. serves as a flotation deviceE. binds nutrients 11. Microorganisms may aggregate and glue themselves to teeth to form dental plaque. This is an example of: A. a biofilmB. a dontoid layerC. annealed enamelD. halitosisE. a dentifrice 12. Some individual microbes secrete small molecules that induce other microbes to settle nearby. The aggregation that forms responds collectively to stimuli and moves in common to new sites and secretes mucilage. This process is called: A. mass-settlingB. quorum sensingC. muco-aggregationD. archae socialityE. pre-sociality 13. Which of the following statements does NOT describe a function of the cell walls of bacteria?...
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- Spring '12