CCRI micro exam 2 vito Questions And Answers With Verified Study Quiz

CCRI micro exam 2 vito Questions And Answers With Verified Study Quiz Chlorine and iodine are classified as - Answerhalogens Obligate aerobes can only live - Answerwhen oxygen is present Microorganism found thriving in a the permafrost region of the Arctic are - Answerpychrophiles Facultative halophiles - Answertolerate an elevated salt concentration in the environment Most bacteria prefer to grow at which pH range? - AnswerMost bacteria prefer to grow at which pH range? The spectrophotometer is used in microbiology to - Answerindirectly measure microbial growth Pyrimidine dimers are formed in DNA when DNA - Answerabsorbs UV radiation These microorganisms are anaerobic but can live in the presence of oxygen even though they do not actually use the oxygen - Answeraerotolerant Which statement is true concerning penicillin? - Answerit destroys the cell wall of bacteria by breaking down peptidoglycan A type of antibiotic that injures the plasma membranes is - Answerpolymyxin B This type of bacteria is most likely to spoil refrigerated food - Answerpsychrotrophs Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37° C incubator and on the shelf of a 50° C incubator. After incubation, there was no growth at 37° C and 50° C, slight growth out on the bench top, and abundant growth at refrigeration. What term could be used for this species? - Answerpsychrotroph Most human diseases are caused these microorganisms - Answermesophiles A microorganism that does not have the enzymes catalase or superoxide dismutase would find it difficult to live in an environment with - Answeroxygen Which antibiotic binds to the 50s portion of the ribosome and inhibits the formation of the peptide bond? - Answerchloramphenicol Microorganisms living around deep sea hydrothermal vents are classified as - Answerhyperthermophiles Sulfanilamides inhibit - Answerenzyme function Mesophiles grow best - Answerbody temperature Fungi are not affected by penicillin because they lack - Answerpeptidoglycan in their cell walls Competitive inhibitors stop enzyme action by binding to - Answerthe active site of the enzyme Microorganisms that can live in the Dead Sea are classified as - Answerextreme halophiles When bacteria are placed in a hypotonic solution, what physiological process occurs? - Answerosmotic lysis