Chapter 7 micro
In figure 7.1, the decimal reduction time (D value) for the culture is approximately
10 minutes
All of the following substances are effective against non-envelope viruses except
Alcohol
In figure 7.1, what is the thermal death time?
60 minutes
Which concentration of ethanol is most effective bactericide
70%
Which of the following pairs is mismatched alcohol
Alcohols and open wounds
Which of the following regarding antimicrobial control agency is false? Collin some agents and activate viruses by
Attacking cell membrane lipids
Which is false regarding antimicrobial control agents. A true antimicrobial control agent is equally effective against both
Bacteria and viruses
Which of the following pairs of terms is mismatched bacteriostatic.
Bacteriostatic. Kills vegetative bacterial cells
All of the following substances are used to preserve food except
Biguanides
Which of the following disinfectants acts by distracting the plasma membrane
Bisphenols
All of the following are effective for destroying prions except
Boiling
And table 7.1 which compound was the most effective against E. coli
Can't be determined based on the info provided
And table 7.1 which compound was bactericidal
Cannot be determined based on the info provided
Which of the following substances is used for surgical hand scrub
Chlorhexidine
In microbial death the cells in a population die at a
Constant rate
Application of heat to living cells can result in all the following except decreased thermal
Death time
The preservation of beef jerky from microbial growth relies on which method of microbial control
Desiccation
An agent used to reduce the number of bacteria on the toilet play most accurately be called
Disinfectant
And table 7.3, which disinfectant is the most effective at stopping bacterial growth
Doom
Which of the following treatments is the most effective for controlling microbial growth
Equivalent treatments
Which of the following chemical agents is used for sterilization
Ethylene oxide
Which of the following methods is used to preserve food by slowing the metabolic processes of foodborne microbes?
Freezing
Which of the following could be used to sterilize plastic petri dishes in a plastic wrapper
Gamma radiation
Oxidizing agents include all the following except
Glutaraldehyde
Which of the following is most resistant to chemical biocides
Gram-negative bacteria
Which of the following is a limitation of the autoclave? It cannot be used with what materials?
Heat labile
Which of the following results and lethal damage to nucleic acid's
Heat, radiation, and some chemicals
The anti-microbial activity of chlorine is due to which of the following? the formation of
Hypochlorous acid
Iodine mixed with a surfactant is called
Iodophor
Which of the following is the best method to sterilize heat labile solutions
Membrane filteration
All of the following are methods of food preservation except
Microwaves
And table 7.3, which infected was bactericidal
Mortum
All of the following factors contribute to hospital acquired infections except
None. All are correct
Disinfection of water is achieved by all the following except
Paracetic acid
Which of the following does not achieve sterilization
Pasteurization
If you were preparing nutrient agar at home and did not have an autoclave, what could you use to sterilize the nutrients agar?
Pressure cooker at 121°C for 15 minutes
In table 7.2 which preservative is most effective
Sodium benzoate
Ethylene oxide is a
Sterilizing agent
Which graph and figure 7.2 best depicts The effect of placing the culture and an autoclave for 15 minutes at a time
Straight line on graph
Bone and tendons for transplant are decontaminated by
Supercritical fluids
Figure 7.1, the thermal death point for this culture is
The answer cannot be determined based on the information provided
In table 7.3, which disinfectant was most effective against salmonella
The answer cannot be determined based on the information provided
Which of the following pairs is mismatched UV radiation
UV radiation and desiccation
In table 7.1 which compound was the most effective against staphylococcus?
Zone of inhibition 10
