chapter 7 questions.pptx

PowerPoint® Clicker Questions prepared by Bradley W. Christian, McLennan Community College CHAPTER 7 The Control of Microbial Growth © 2016 Pearson Education, Ltd. The removal or destruction of ALL forms of microbial life is called a) b) c) d) sterilization. disinfection. pasteurization. sanitizatio...

PowerPoint® Clicker Questions prepared by Bradley W. Christian, McLennan Community College CHAPTER 7 The Control of Microbial Growth © 2016 Pearson Education, Ltd. The removal or destruction of ALL forms of microbial life is called a) b) c) d) sterilization. disinfection. pasteurization. sanitization. © 2016 Pearson Education, Ltd. The removal or destruction of ALL forms of microbial life is called a) b) c) d) sterilization. disinfection. pasteurization. sanitization. © 2016 Pearson Education, Ltd. The destruction of vegetative pathogens is called a) b) c) d) sanitization. sterilization. disinfection. antisepsis. © 2016 Pearson Education, Ltd. The destruction of vegetative pathogens is called a) b) c) d) sanitization. sterilization. disinfection. antisepsis. © 2016 Pearson Education, Ltd. What treatment is intended to lower microbial counts on eating and drinking utensils to safe public health levels? a) b) c) d) sanitization sterilization pasteurization antisepsis © 2016 Pearson Education, Ltd. What treatment is intended to lower microbial counts on eating and drinking utensils to safe public health levels? a) b) c) d) sanitization sterilization pasteurization antisepsis © 2016 Pearson Education, Ltd. The absence of significant contamination is referred to as a) b) c) d) sepsis. bacteriostasis. asepsis. biocide. © 2016 Pearson Education, Ltd. The absence of significant contamination is referred to as a) b) c) d) sepsis. bacteriostasis. asepsis. biocide. © 2016 Pearson Education, Ltd. Commercial sterilization is a limited heat treatment to destroy a) b) c) d) Streptococcus pyogenes. Clostridium tetani. Staphylococcus aureus. Clostridium botulinum endospores. © 2016 Pearson Education, Ltd. Commercial sterilization is a limited heat treatment to destroy a) b) c) d) Streptococcus pyogenes. Clostridium tetani. Staphylococcus aureus. Clostridium botulinum endospores. © 2016 Pearson Education, Ltd. Which of the following best describes the rate of microbial death when treated with antimicrobial chemicals? a) b) c) d) Cells in a population die at a constant rate. All cells in a population die at once. Some cells are never killed. The rate varies, depending on the species. © 2016 Pearson Education, Ltd. Which of the following best describes the rate of microbial death when treated with antimicrobial chemicals? a) b) c) d) Cells in a population die at a constant rate. All cells in a population die at once. Some cells are never killed. The rate varies, depending on the species. © 2016 Pearson Education, Ltd. MOST disinfectants work better in ________ solutions. a) b) c) d) cold warm acidic organic © 2016 Pearson Education, Ltd. MOST disinfectants work better in ________ solutions. a) b) c) d) cold warm acidic organic © 2016 Pearson Education, Ltd. Damage to which structure causes cellular contents to leak into the surrounding medium? a) b) c) d) cell wall plasma membrane nucleoid glycocalyx © 2016 Pearson Education, Ltd. Damage to which structure causes cellular contents to leak into the surrounding medium? a) b) c) d) cell wall plasma membrane nucleoid glycocalyx © 2016 Pearson Education, Ltd. In hospitals, the presence of ________ in blood, vomitus, and feces influences the selection of disinfectants. a) b) c) d) organic matter inorganic matter pathogens odors © 2016 Pearson Education, Ltd. In hospitals, the presence of ________ in blood, vomitus, and feces influences the selection of disinfectants. a) b) c) d) organic matter inorganic matter pathogens odors © 2016 Pearson Education, Ltd. To sterilize heat-sensitive solutions such as culture media, enzymes, and vaccines, one should use a) b) c) d) dry heat. an autoclave. filtration. pasteurization. © 2016 Pearson Education, Ltd. To sterilize heat-sensitive solutions such as culture media, enzymes, and vaccines, one should use a) b) c) d) dry heat. an autoclave. filtration. pasteurization. © 2016 Pearson Education, Ltd. Which method kills microorganisms primarily by the coagulation of proteins (denaturation)? a) b) c) d) filtration radiation desiccation moist heat © 2016 Pearson Education, Ltd. Which method kills microorganisms primarily by the coagulation of proteins (denaturation)? a) b) c) d) filtration radiation desiccation moist heat © 2016 Pearson Education, Ltd. Direct flaming is one of the simplest methods of a) b) c) d) pasteurization. dry heat sterilization. moist heat sterilization. desiccation. © 2016 Pearson Education, Ltd. Direct flaming is one of the simplest methods of a) b) c) d) pasteurization. dry heat sterilization. moist heat sterilization. desiccation. © 2016 Pearson Education, Ltd. The lowest temperature at which ALL of the microorganisms in a particular liquid suspension will be killed in 10 minutes is called the a) b) c) d) thermal death point. thermal death time. decimal reduction time. decimal reduction point. © 2016 Pearson Education, Ltd. The lowest temperature at which ALL of the microorganisms in a particular liquid suspension will be killed in 10 minutes is called the a) b) c) d) thermal death point. thermal death time. decimal reduction time. decimal reduction point. © 2016 Pearson Education, Ltd. Which of the following have little value as antiseptics, but are used to mechanically remove microbes? a) b) c) d) biguanides quats chlorines soaps © 2016 Pearson Education, Ltd. Which of the following have little value as antiseptics, but are used to mechanically remove microbes? a) b) c) d) biguanides quats chlorines soaps © 2016 Pearson Education, Ltd. Which of the following injure(s) plasma membranes and was/were first used by Lister to control surgical infections? a) b) c) d) halogens ozone phenolics ethylene oxide © 2016 Pearson Education, Ltd. Which of the following injure(s) plasma membranes and was/were first used by Lister to control surgical infections? a) b) c) d) halogens ozone phenolics ethylene oxide © 2016 Pearson Education, Ltd. The recommended optimum concentration of ethanol to use as a biocide is a) b) c) d) 100%. 70%. 50%. 10%. © 2016 Pearson Education, Ltd. The recommended optimum concentration of ethanol to use as a biocide is a) b) c) d) 100%. 70%. 50%. 10%. © 2016 Pearson Education, Ltd. Which of the following include the cationic detergents? a) b) c) d) quats halogens phenolics alcohols © 2016 Pearson Education, Ltd. Which of the following include the cationic detergents? a) b) c) d) quats halogens phenolics alcohols © 2016 Pearson Education, Ltd. One of the few liquid chemical disinfectants that can be considered a sterilizing agent and is also used for embalming is a) b) c) d) alcohol. plasma. glutaraldehyde. iodine. © 2016 Pearson Education, Ltd. One of the few liquid chemical disinfectants that can be considered a sterilizing agent and is also used for embalming is a) b) c) d) alcohol. plasma. glutaraldehyde. iodine. © 2016 Pearson Education, Ltd. Peracetic acid is a liquid chemical sporicide that is a type of a) b) c) d) peroxygen. biguanide. aldehyde. halogen. © 2016 Pearson Education, Ltd. Peracetic acid is a liquid chemical sporicide that is a type of a) b) c) d) peroxygen. biguanide. aldehyde. halogen. © 2016 Pearson Education, Ltd.