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The following will prevent the growth of bacteria:
Keeping food at room temperatureKeeping food hotKeeping food coveredKeeping food cold
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- 3) CULTIVATING MICROBES: Definitions Ingredients Beef What does not grow What grows Chemoheterotrophs Fastidious Media Complex Agar Broth Yeast Soy Thioglycolate MSA McConkey EMB BloodThe inhibition of bacterial growth and reproduction without necessarily destroying the organisms is the result of a disinfectant a sterilant a bactericide an antisepticMicroorganisms are involved in each of the following processes EXCEPT infection fog production decomposition of organic materials O food production oxygen production
- What is the word used to describe microbes which have simple enzyme systems and which require growth factors (e.g. vitamins, amino acids) to grow? Trouble Buffer Fastidious EasyBesides 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.What microbes are found in the following foods? –Country-cured ham –Dry sausages –Coffee beans –Miso –Poi –Olives –San Francisco Sourdough bread
- Use of chemical agents to destroy microbes on skin or tissues Reinoval of microbes from surfaces by scrubbing Removal or destruction of all microbes Use of chemical agents to destroy microbes on surfaces used by the public Use of physical/chemical agents to destroy microbes on non-living objects Free of contamination by pathogens Antisepsis (antiseptic) Aseptic Degerming Sanitization Sterilization DisinfectionWhich of the following prevented an aerotolerant anaerobic, mesophilic and halophilic bacterium from contaminating your home aquarium? the water was at 37ºC you placed a high amount of glucose into the aquarium you placed several pennies in the aquarium you were using a .45 um filtering unit you placed carbon dioxide instead of oxygen into the aquariumWhich of the following is an example of pasteurization? A surgeon washes her hands before surgery. A public toilet is treated with disinfectants. A nurse prepares an injection site with an alcohol swab. An autoclave is used to prepare nutrient agar. Heat is used to kill potential pathogens in apple juice.
- In the laboratory, autoclaving is required to prepare media for the growth of microorganism. What type of method of control does this involve? Dry Heat Moist Heat Chemical Radiation All of the optionsOne of the useful properties of agar is its inability to be digested by most microbes. True FalseSewage works use microbes in many ways to break down organic matter. Which of the following processes is NOT carried out? Pathogenic bacteria and viruses are added to the input sewage as a tracer and to ensure the processes have all worked well Bacteria and archaea are used in sludge digesters to breakdown organic matter anaerobically Bacterial trickle filter beds have a wide variety of microbes to break down organic matter Activated sludge selects for Gram negative bacteria that break down waste