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- Which of the polysaccharides WILL DECREASE GELLING if acid is added to the sample? pectins agar chitin alginatescell number This bacterium can be classified as a: hyperthermophile psychrophile thermophile mesophile 4ºC 44°C Time 37ºC 22ºCIn an acid-fast staln, acid fast bacteria retain their primary stain after the decolorization step with acid alcohol because of the In their cell walls. O peptidoglycan O lipopolysaccharldes teichoic acids O phospholipids O mycolic acid
- Clostridium Botulinum Physical caracteristics Shape Arrangement Gram status? Acid fast ? Capsule? Produce Endospore? Environmental Condition required for the growth Oxygen Which of these is: Obligate aerobe, obligate anaerobe, facultative anaerobe. Temperature Which of these is: Psychrophile, Mesophile, Thermophile pH Which of these is: Acidophile, Neutralophile, AlkaliphileThe formation of hydrophobic bonds is the primary driving force behind aggregation of amphiphiles in aqueous solutions. O True FalseThe following ingredient list represents which type of growth media? Beef extract 1.5 g Yeast extract 3.0 g Peptone 6.0 g Glucose 1.0 g Agar 15.0 g water 1000 ml pH 6.6
- A lab interested in isolating Escherichia coli from food samples uses a lot of Eosin Methylene Blue (EMB) Agar. The recipe for this media is 36 g/L deionized water. How many grams of media would be required to prepare 350 plates assuming 20 mL per plate? 072 O 112 O 90 O 252Laboratory Exercises in Microbiology Results for Metabolic Tests McLaughlin and Petersen Lactose Bacteria Gram stain Morphology Arrangement Fermentation Gelatinase Amylase Urease Citrate permease Tryptophanase (Indole test) Catalase (Simmon's citrate) Bacillus subtilis Corynebacterium xerosis Enterobacter aerogenes Escherichia coli Micrococcus luteus Pseudomonas aeruginosa Proteus vulgaris Staphylococcus аureus Streptococcus faecalis Serratia тarcescens The tests in the table above will be available for your practical exam. Use your results from Lab 5 to fill out this table. Results for the bacteria that were not tested in Lab 5 can be found on the Microbiology Review site on Blackboard.MacConkey Agar Lactose fermenter or non-fermenter: ___________________________ Gram reaction based on MAC Growth: ___________________________ Coliform or non-coliform: _____________________________________
- Which of the following bacteria oxidize nitrite (NO2-) to produce nitrate (NO3-)? Azospirillum Cyanobacter Nocardia Nitrobacter RhizobiumYou are studying a bacterium which uses sunlight to produce its own organic compounds from carbon dioxide. Which of the following is the best way to describe the way that the bacterium acquires energy and organic compounds? chemolithotroph chemolithotroph O chemoorganoheterotroph O photoautotroph O photoheterotrophSulfur Indole Motility (SIM) Medium H2S produced, color and +/-: ______________________________ Indole present/Tryptophan hydrolysis, color and +/-: ___________________________ Motile or non-motile: _____________________________