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BIOS 255- Final Exam review Questions and Answers
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BIOS 255- Final Exam review Questions and Answers
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BIOS 255- Final Exam review Questions and AnswersTaxonomic Hierarchy Correct Ans-Domain, Kingdom, Phylum, Class, Order, Family, Genus,
Species
Scientific Nomenclature Correct Ans-Carlos Linnaeus, system gives every organism 2
names which include the genus and the species
Agar Correct Ans-a gel-like polysaccharide compound used for culturing microbes;
extracted from certain red algae __is the solidifying agent in media, but by itself has no
nutritive value
Culture Correct Ans-The observable growth of the microorganism in or on the medium is
considered to be the __
media Correct Ans-The environment in which it is placed is called a ___ (liquid or solid)
, BIOS 255- Final Exam review Questions and Answers
colony Correct Ans-The attempt to cause the growth of a single cell to, in turn, grow into
an entire ____ (single mound of cells) of the exact same kind of cell
alpha hemolysis Correct Ans-partial/incomplete lysis of red blood cells with dark greenish-
brown zones around colonie
beta hemolysis Correct Ans-total lysing of rbc's with clear zones around colonies
gamma hemolysis Correct Ans-no lysing of rbc's with agar remaining red around colonie
Morphology Correct Ans-(Shape):
1. Bacillus or bacilli - "rod-shaped."
2. Coccus or cocci - "round".
3. Spiral - "twisting" (three types).
, BIOS 255- Final Exam review Questions and Answers
arrangement of bacillus Correct Ans-bacillus,
diplobacillus,
streptobacillus, and
palisades.-side to side
Arrangements of Cocci Correct Ans-coccus,
diplococcus,
streptococcus,
staphylococcus,
tetrad, 4
sarcinae. 8
Spiral Arrangements: Correct Ans-Do not take on any particular arrangements. Always
singular.
, BIOS 255- Final Exam review Questions and Answers
Spiral Morphology Correct Ans-vibrio ) or (
spirillum helical
spirochete corkscrew
Haloarcula Correct Ans-rectangular shaped bacteria
peptoglycan Correct Ans-protein and sugar that make up bacteria cell walls
Gram staining reactions Correct Ans-Gram positive(+) cells - contain cell walls (primarily
peptidoglycan) that are very thick. PURPLE
Gram negative(-) cells - contain cell walls (peptidoglycan) that are very thin. PINK/RED
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