100%(63)63 out of 63 people found this document helpful
This preview shows page 1 - 4 out of 7 pages.
The preview shows page 3 - 4 out of 7 pages.
UNE BIOL 1020 Lab Final Exam Study GuideBacterial lawnis a term used by microbiologists todescribe the appearance of bacterial colonies when allthe individual colonies on a petri-dish agar plate mergeto form a field or mat of bacteriaZone of inhibitionis the area around an antibiotic discthat contains no bacterial growth.Intermediate level of susceptibilityrequires higherdosage of antibiotic to be successfulA nutrient agar plate allows the growth ofmany different bacteria. It is an example ofwhich type pf media?Selective – Differential – Selective and differential –General purposeWhich of the following images illustrates streak plate technique?The results of carbohydrate fermentation testing using maltose with phenol red as an indicator are shownbelow. Which of the tubes shows the result from a bacterial species that does not produce hydrogen as aby-product of its ability to ferment maltose? (A, B, C or E, D, None)Yellow w/o gas production (orange)
The only information which might be obtained about a bacterial culture from observing its growth on anutrient agar plate would be theColony morphology– Cell morphology – Motility – Gram reaction – Salt toleranceStaphylococcus epidermidis is different from Saccharomyces cerevisiae becauseS. epidermidis is able to ferment fructose – S. cerevisiae may be grown in nutrient broth –S. epidermidis is aprokaryote– S. cerevisiae is able to ferment glucoseA positive catalase test will identifyAerobic organisms– Hydrogen gas producers by utilizing a Durham tube – Acetoin intermediates of glucosefermentation – anaerobic microorganismsThe term “lophotrichous” refers toA fermentative gas producer –A tufted flagellar arrangement– An enriched medium containing growth factors – Abacterium demonstrating no motilityAll of the following pertain to the stained bacteria below exceptNegative Gram stain – Diplococcus morphology – Lipopolysaccharide –Teichoic acid– EndotoxinThe vaccine for the Yellow Fever virus is an attenuated vaccine, meaning that it isA preparation containing virus particle that have been destroyed or “killed” – A preparation of Yellow Fever viruswhich is both virulent and very antigenic – An antibody preparation derived from the serum of immunized animalsor immune human donors –A preparation containing live Yellow Fever viruses that are very weakened and havevery low virulence
Each summer in Massachusetts illness caused by Vibrio parahaemolyticus trigger mandatory a 14-dayfederally mandated ban on the harvesting and/or processing of oysters from the locations where theoysters originated….An intoxication – An exotoxin – A cross contamination – Botulism – AnaphylaxisSome of the common end-products of carbohydrate fermentation include all of the following exceptPropionic acid – Ethyl alcohol – Acetic acid –pyruvic acid– Butyric acid