Microbiology (Dr. AL, LSUE) Exam 2 | 100% Correct | Verified | 2024 Version

Which of the following has bacteriochlorophylls and uses alcohols for carbon? - D) photoheterotroph Consider a culture medium on which only gram-positive organisms such as Staphylococcus aureus colonies can grow due to an elevated NaCl level. A yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the pH as a result and changing the color of a pH indicator chemical. The type of medium would be referred to as a(n) - D) selective and differential medium In one hospital, Pseudomonas aeruginosa serotype 10 infected the biliary tracts of 10 percent of 1300 patients who underwent gastrointestinal endoscopic procedures. After each use, endoscopes were washed with an automatic reprocessor that flushed detergent and glutaraldehyde through the endoscopes, followed by a tap water rinse. P. aeruginosa serotype 10 was not isolated from the detergent, glutaraldehyde, or tap water. What was the source of the infection? - B) a biofilm in the reprocessor A biochemical test, in the microbiology world, is used to determine - D) capability of a microbe to perform a specific enzymatic activity Which one of the following provides taxonomic information that includes the information obtained in each of the other options listed? - E) cladogram Flow cytometry, where a cell is passed through a light source such as a laser beam, can directly indicate all EXCEPT which one of the following about a cell? - C) density Which of the following bacteria is gram-negative? - A) Treponema Which of the following form conidiospores? - B) actinomycetes and related organisms Streptomyces differs from Actinomyces because Streptomyces - D) is a strict aerobeWhich of the following statements regarding lichens is FALSE? - A) Lichens are a mutualistic relationship between a fungus and a protozoan Which of the following statements is FALSE? - D) fungal spores are highly resistant to heat and chemical agents Which of the following groups of algae does NOT produce compounds that are toxic to humans? - C) green algae Which of the following statements about viral spikes is false? - E) They are found only on non enveloped viruses Continuous cells lines differ from primary cell lines in that - D) continuous cell lines can be maintained through an indefinite number of generation