Answer Happy

1. A rapid procedure for determining the degree of sensitivity or resistance to a number of antibiotics on an agar plate is known as the A) Ames's test B) minimum inhibitory concentration (MIC) test C) the Kirby Bauer test D) broth dilution test E) none of the above identify 2. An exotoxin produced by a gram positive spore forming bacteria, which may be normally found in the soil, is best associated with the following A) flaccid paralysis B) rice water stools C) presence of IGA D) all of the above E) none of the above = identify 3. Rhizobium sp., a symbiont within the root nodules cells of legumes, is a gram negative aerobic rod that function in nitrogen fixation, is characterized by A) high teichoic acids presence in the cell wall B) formation of resistant spores C) loses the crystal violet complex with decolorization D) stains with the counter stain potassium iodide reagent E) none of the above = identify 4. Faecalibacterium prausnitzii an anaerobic variable Gram staining rod in the gut microflora, produces short chain fatty acids from the fermentation of dietary fiber, is believed to play a protective role against the development and possible treatment of colorectal cancer would characteristically be expected to: A) produce colorless colonies on MaConkey's agar incubated aerobically B) growth only in the bottom of thioglycollate broth C) dispersed cloudy appearance in SIM media D) all of the above E) none of the above = identify 5. Fermentation differs from anaerobic respiration in that only fermentation A) uses glycolysis as a pathway B) forms organic acids or alcohol end products C) releases energy from glucose D) uses ATP in the initial reactions E) none of the above = identify 6. An agent that kills microorganism and is used to clean the surface of tables, sinks, furniture and similar objects is best described as a(n) A) sterilant B) disinfectant C) antiseptic D) antibiotic E) either of the above 7. Lactose fermenters on TSI agar correspond to the following: A) pink colonies on MaConkey's agar C) colorless colonies on EMB agar D) hemolysis on blood agar E) none of the above identify.