What statement describes the danger of using heavy metals to control microbe growth? Group of answer choices Heavy metals promote biofilm formation in humans. Heavy metals stimulate some microbes to reproduce even more. Heavy metals can assist with virus attachment to host cells. Heavy metals are toxic to many organisms besides microbes.

What statement describes the danger of using heavy metals to control microbe growth? Group of answer choices Heavy metals promote biofilm formation in humans. Heavy metals stimulate some microbes to reproduce even more. Heavy metals can assist with virus attachment to host cells. Heavy metals are toxic to many organisms besides microbes.

Biomedical Instrumentation Systems

1st Edition

ISBN:9781133478294

Author:Chatterjee

Publisher:Chatterjee

Chapter19: Biomedical Laboratory Instrumentation

Section: Chapter Questions

Problem 4Q

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Besides dehydrated foods, how might the amount of water available to microbes be decreased? Group of answer choices Treatment by non-ionizing radiation. Treatment at high pressures for extended periods of time. Storage at temperatures between -2 and 4 °C. Pasteurization Addition of solutes such as salt or sugar.
When food leftovers are stored in a refrigerator, how does this help prevent food borne illnesses? Group of answer choices Low temperatures deactivate any toxins that might be produced by microbes. Low temperatures inhibit the metabolism and growth of microbes. Low temperatures disrupt microbe membranes and kill any microbes that are present. Low temperatures prevent microbes from forming biofilms.
Which of the following statements regarding microbial death is FALSE? Question options: cell walls are targeted by many microbial control agents the effectiveness of an antibacterial agent is a funciton of its microbial death rate the rate at which microbes are killed is termed the microbial death rate all of these statements are TRUE few antimicrobial agents function through the disruption of protein structure under a given set of conditions, the fraction of a microbial population that dies per minute is typically constant over time
Surgical instruments are cleaned by heating them. Alcohol is used as disinfectant in cleansing the skin before inoculation. Why are these methods successful in killing harmful microorganisms ? Explain the answer using the concepts of protein inside the microorganisms cell wall etc
What statement correctly explains why moist-heat is more effective than dry-heat for sterilization purposes? The microbe's molecules are resistant to alteration in the absence of water. Dry heat will always be a lower temperature than moist heat. Dry heat dehydrates the microbes, and dehydration is a method of preserving microbes. Water is a good conductor of heat.
Which of the following statements regarding microbial death is FALSE? Question options: cell walls are targeted by all microbial control agents all of these statements are TRUE many antimicrobial agents function through the disruption of protein structure under a given set of conditions, the fraction of a microbial population tht dies per minute is typically constant over time the effectiveness of an antibacterial agent is a function of its microbial death rate the rate at which microbes are killed is termed the microbial death rate
The clear zone around an antibiotic disk Multiple Choice is a plaque indicating the bacteria got killed is a zone of inhibition is a zone of inhibition indicating resistance of microbes is a zone of inhibition indicating susceptibility of microbes
Why is there a need for an incubator in the lab? How about incubating cultures at room temperature? How can this affect microbes?
Which of the following statements regarding microbial control agents is FALSE? Question options: strongly acidic or alkaline disinfectants are typically more effective than neutral pH agents the presence of extracellular fats typically decreases the effectiveness of control agents a warmed disinfectant is typically more effective than the same disinfectant at room temperature substances secreted by members of biofilms increase protection against microbial control agents all of these statements are TRUE bacterial endospores are more resistant to antimicrobial treatment than vegetative bacterial cells
The inhibition of bacterial growth and reproduction without necessarily destroying the organisms is the result of a disinfectant a sterilant a bactericide an antiseptic
In one paragraph of at least 150 words, answer the following questions (IN YOUR OWN WORDS): List three environmental factors that influence microbes and discuss why these factors are important to their survival.
Tell me three things that you know about controlling microbial growth - think about how you handle certain foods in you home. Why is it so important to learn about how we can control microbes?