Study Material Test Bank - Full Answer Key Verified

Study Material Test Bank - Full Answer Key Verified the development of virulent, toxin-producing bacterial strains due to the presence of a temperate phage can occur through the process of: - answer - specialized transduction The method of removing vegetative microbial life forms and debris to reduce contamination to safe levels is termed_________. - answer - sanitization the ______are drugs that deposit in developing teeth and cause permanent brown discoloration - answer - tetracylcines Surfactants work by A. Coating the organism preventing interaction with its environment B. Blocking transport into the organism C. Blocking transport out from the organism D. Disrupting membrane integrity E. All of the choices are correct - answer - disrupting membrane integrity which of the following microbial forms has the highest resistance to physical and chemical controls? - answer - bacterial endospores a microorganism that does not have catalase or superoxide dismutase would find it difficult to live in an environment with _____ - answer - oxygen What type of mutation alters the base, but not the amino acid being coded for? - answer - silent movement of substances from lower to higher concentration across a semipermeable membrane that must have a specific protein carrier and cell expenditure of energy is called_____ - answer - active transport all_consist of a thiazolidine ring, a beta-lactam ring, and an R group - answer - Penicillins How do sulfonamides work? - answer - inhibit folic acid synthesis Base pairs in DNA are held together by _____ bonds. - answer - hydrogen Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar and in a candle jar. After incubation there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf. This species is a/an - answer - facultative anaerobe How do aminoglycosides work? - answer - inhibit protein synthesis which of the following types of control agents would be used to achieve sterility? - answer - sporicide all of the following pertain to transcription except a process used in the synthesis of protien requires RNA polymerase occurs before translation requires a template of DNA strand occurs on a ribosome in the cytoplasm - answer - occurs on a ribosome in the cytoplasm each of the following results in drug resistance except a drug - answer - being used as a nutrient by the cell which of the following is not a major element of a microbial cell - answer - cooper each of the following is a target of antimicrobial agents except - answer - cytoplasm which of the following is not a mode of action of antiviral drugs - answer - bond to ergoterol in the cell membrane Bacteria living in a freshwater stream that are moved to salty seawater would - answer - become dehydrated due to the loss of water all of the following could find a location in or on body tissues suitable for growth except - answer - psychrophiles the alcohol wipe used on a patients skin before an injection is an example of - answer - anisepsis who discovered transposons? - answer - Barbara McClintock which of the following microorganisims would find hypotonic conditions most detrimental - answer - protozoa Which is incorrect about inducible operons? - answer - have genes turned off by a buildup of end product 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? - answer - facultative aerobe which of the following does not affect microbial nucleic acids? - answer - moist heat When microbes are in a close nutritional relationship, and one benefits but the other is not harmed, it is called - answer - commensalisim the antipar