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