NESTER'S MICROBIOLOGY-ACCESS
9th Edition
ISBN: 9781260518498
Author: Anderson
Publisher: MCG
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Textbook Question
Chapter 5, Problem 10MC
Which of the following is false?
a) A high-level disinfectant cannot be used as a sterilant.
b) Critical items must be sterilized before use.
c) Low numbers of endospores may remain on semicritical items.
d) Standard sterilization procedures do not destroy prions.
e) Quaternary ammonium compounds can be used to disinfect food preparation surfaces.
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Students have asked these similar questions
Which of the following is false?a) A high-level disinfectant cannot be used as a sterilant.b) Critical items must be sterilized before use.c) Low numbers of endospores may remain on semicritical items.d) Standard sterilization procedures do not destroy prions.e) Quaternary ammonium compounds can be used to disinfect food preparation surfaces.
The Petri Dish method is used in microbiology to raise bacteria in: a) rapid growth b) pure culture c) septic environment d) all of the above 2. What is the difference between antiseptic and sanitization?3. In order to prevent any kind of contamination the medium must be _________ before placing it in the Petri dish. a) lyophilized b) pasteurized c) autoclaved d) distille
In sterilization, which among the supplies, instruments, glassware, etc. under the list of materials can be sterilized using either or both equipment below? List them down under the category: a) For “autoclaving” only, B) For Dry heat oven sterilization ,And C) Can be sterilized with either.
Materials:
200-ml Erlenmeyer flask Stove
500-ml Erlenmeyer flask Autoclave
10-mL graduated cylinder Analytical balance
100-ml graduated cylinder pH meter
Spatula Stirring rod
100-mL beaker Test tubes
Distilled water Petri dish
Stirring rod Alcohol lamp
Glass dropper
Chapter 5 Solutions
NESTER'S MICROBIOLOGY-ACCESS
Ch. 5 - How is preservation different from pasteurization?Ch. 5 -
2. What is the most chemically resistant...Ch. 5 - Explain why it takes longer to kill a population...Ch. 5 - What is the primary reason that wine is...Ch. 5 -
5. What is the primary reason that milk is...Ch. 5 - When canning, why are low-acid foods processed at...Ch. 5 - How are heat-sensitive liquids sterilized?Ch. 5 -
8. How does microwaving a food product kill...Ch. 5 -
9. How is an iodophore different from a tincture...Ch. 5 - Name two products commonly sterilized using...
Ch. 5 - Unlike a disinfectant, an antiseptic a) sanitizes...Ch. 5 - The D value is defined as the time it takes to...Ch. 5 - Prob. 3MCCh. 5 - Prob. 4MCCh. 5 - Which concentration of alcohol is the most...Ch. 5 - All of the following could be used to sterilize an...Ch. 5 - All of the following are routinely used to...Ch. 5 - Aseptically boxed juices and cream containers are...Ch. 5 - Commercial canning processes are designed to...Ch. 5 -
10. Which of the following is false?
a) A...Ch. 5 - An agriculture extension agent is preparing...Ch. 5 - As a microbiologist representing a food...Ch. 5 - This graph shows the time it takes to kill...Ch. 5 -
2. This diagram shows the filter paper method...
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- Which of the following is used in the sterilization of the medium?a) benmargeb) swabc) autoclaved) centrifugee) coolingarrow_forward1. The Petri Dish method is used in microbiology to raise bacteria in: a) rapid growth b) pure culture c) septic environment d) all of the above 2. What is the difference between antiseptic and sanitization? 3. In order to prevent any kind of contamination the medium must be _________ before placing it in the Petri dish. a) lyophilized b) pasteurized c) autoclaved d) distilledarrow_forwardListen Which of the following methods of microbial control is used most often with surgical equipment? a) autoclave b) sugar and salting c) dessication d) lyophilizationarrow_forward
- If the pH indicator were left out of MacConkey agar, the medium would bea) complex.b) differential.c) defined.d) defined and differential.e) complex and differential.arrow_forwardFiltration does/is NOT...?a) Sterilize heat sensitive liquidsb) Kill microbesc) Sterilize providing pores are exceedingly smalld) Used in preparation of vaccines, vitamins, and drugse) Used to capture microbes in ventilation systems via HEPA filters Which of the following is false?a) Pasteurization does not sterilizeb) Ionization radiation is useful for sterilizing food and pharmaceuticals c) Phenolics can be used as antisepticsd) Isopropyl alcohol can sterilize the skine) Steam autoclaving is an effective means of sterilization Which of the following is not a factor that determines the effectiveness of an antimicrobial agent? a) Time of exposure b) Temperature c) pH d) Concentration of agent e) All of the above are factors that determines the effectiveness of an antimicrobial agent 4. Which of the following is not a specific cell target for antimicrobial agents? a) Capsule b) Cell wallc) Cell membraned) DNA / RNA synthesis e) Protein function 5. Which of the following…arrow_forwardWhich of the following is a limitation of the autoclave? a) Long length of time required for sterilization. b) Inability to use with heat sensitive materials. c) Inability to use with common lab equipment like glassware. d) Does not sterilize, only sanitizes. e) All of the above are limitation of the autoclave.arrow_forward
- Is the Mueller-Hinton Agar (MHA) a complex or defined medium? Explain based on its composition. Is MHA a A) differential, B) selective, C) both differential and selective media, or D) neither? Explain based on what kind of microorganisms it allows to grow.arrow_forwardTransparent double-sided dishes used for growing microbes are most commonly called A) Petri dishes. B) baker dishes. C) sterilization plates. D) culture medium plates.arrow_forwardWhich of the following agents if introduced into a growing culture of bacteria would halt growth but if removed would allow growth to continue? A) Antiseptic B) Bacteriostatic agent C) Disinfectant D) Bactericidal agent E) Sterilizing agentarrow_forward
- -For each item listed below, select a sterilant that you feel is the most suitable and effective for that item. Discuss why you selected each sterilant.? A) plastic Petri dishes to be used for nutrient media B) glass tubes of bacterial cultures to be discarded C) sterile milk D) dozens of reusable glass pipets E) bone tissue for grafting F) room air G) hospital mattresses H) biopsy tissue for histology analysis I) plastic respiratory therapy equipment and arthroscopes J) vaccinesarrow_forwardWhich statement among A-D is false regarding physical and chemical agents of control? A) O Effective killing of bacteria via irradiation with UV light would likely take longer than if irradiated with gamma rays or x-rays. B) O Detergent-type disinfectants exert their effect by solubilizing membranes. C) O Antiseptics are generally not as strongly concentrated as disinfectants D) O Sterilization and pasteurization are equivalent processes.arrow_forwardColony formation can be observed in liquid media. a) Trueb) Falsearrow_forward
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