Micr221 Exam Questions With Correct Answers

MICR221 EXAM QUESTIONS WITH
CORRECT ANSWERS


Symbiosis - CORRECT ANSWER✔✔-Living together of organisms
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Four types of Symbiosis - CORRECT ANSWER✔✔-Commensalism,
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Mutualism, Pathogenesis and Parasitism
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Commensalism - CORRECT ANSWER✔✔-A symbiotic relationship in
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which one organism, benefits and the other is neither helped nor
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harmed.


Mutualism - CORRECT ANSWER✔✔-Relationship in which both
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organisms benefit. |




Pathogenesis - CORRECT ANSWER✔✔-Relationship in which one
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organism is harmed. (the pathogen may or may not grow outside of
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host)


Parasitism - CORRECT ANSWER✔✔-One organism is harmed ( parasite
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can not grow outside of host)
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, 2 Examples Mutualism - CORRECT ANSWER✔✔-Lichen, Bovine Rumen
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Lichen organisms - CORRECT ANSWER✔✔-fungi, green algae, and/or
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cyanobacteria.


In Lichen Green algae/ cyanobacteria provide - CORRECT ANSWER✔✔-
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carbon source for fungi | | |




In Lichen Fungi provides - CORRECT ANSWER✔✔-water, minerals and
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substratum


Bovine Rumen - CORRECT ANSWER✔✔-Harbours bacteria that digest
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cellulose and other plant polysaccharides.
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What bacteria does in bovine rumen - CORRECT ANSWER✔✔-allow host
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to obtain nutrients from grass/grain.
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Example of Commensalism - CORRECT ANSWER✔✔-E. coli with
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anaerobes like bacteriodes in the intestine.| | | | |




The important role intestinal flora play in human nutrition. - CORRECT
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ANSWER✔✔-Vitamin synthesis, digestion of polysaccharides. | | | |