Biology
Microorganisms in Food Production
1,086 Questions
Microorganisms play a vital role in food production through processes like fermentation and bioprocessing. Questions on this topic cover the use of yeast, bacteria, and industrial microbiology. These concepts are important for science sections in various competitive exams.
Alcoholic fermentationDairy beverage productionIndustrial ethanol preparationCitric acid productionBiodigester temperature
Microorganisms in Food Production Questions
What is the process by which lactose in milk is converted into lactic acid?
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Fermentation
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Pasteurization
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Homogenization
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Ultrafiltration
A
Correct answer
Explanation
Fermentation is the process by which lactose in milk is converted into lactic acid by bacteria.
Which type of culture medium is commonly used in upstream processing for microbial growth?
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Defined Medium
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Complex Medium
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Synthetic Medium
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Semi-defined Medium
B
Correct answer
Explanation
Complex media are commonly employed in upstream processing for microbial growth as they provide a rich source of nutrients, including amino acids, vitamins, and other essential components, supporting robust cell growth and product formation.
What is the purpose of inoculum preparation in upstream processing?
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To prepare a starter culture
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To introduce microorganisms or cells into the bioreactor
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To ensure genetic stability of the culture
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All of the above
D
Correct answer
Explanation
Inoculum preparation involves preparing a starter culture, introducing microorganisms or cells into the bioreactor, and ensuring genetic stability of the culture to initiate and maintain efficient cell growth and product formation.
Which parameter is commonly used to assess the growth rate of microorganisms or cells during upstream processing?
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Specific Growth Rate
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Doubling Time
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Lag Phase Duration
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All of the above
D
Correct answer
Explanation
Specific growth rate, doubling time, and lag phase duration are commonly used parameters to assess the growth rate of microorganisms or cells during upstream processing, providing insights into cell proliferation and overall culture performance.
Which of the following is a bioprocess used in the production of pharmaceuticals?
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Fermentation
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Distillation
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Extraction
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Chromatography
A
Correct answer
Explanation
Fermentation is a bioprocess that uses microorganisms, such as bacteria or yeast, to convert raw materials into desired products. In the pharmaceutical industry, fermentation is used to produce antibiotics, vaccines, and other drugs.
Which of the following is a bioprocess used in the production of chemicals?
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Bioremediation
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Biodegradation
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Bioconversion
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All of the above
D
Correct answer
Explanation
Bioprocesses are used in the chemical industry for a variety of purposes, including bioremediation, biodegradation, and bioconversion. Bioremediation is the use of microorganisms to clean up contaminated environments; biodegradation is the breakdown of organic compounds by microorganisms; and bioconversion is the conversion of one compound into another using microorganisms.
What are some of the potential applications of bioprocesses in the chemical industry?
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Production of biofuels
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Development of new materials
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Pollution control
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All of the above
D
Correct answer
Explanation
Bioprocesses have a wide range of potential applications in the chemical industry, including the production of biofuels, the development of new materials, and pollution control. Biofuels are renewable fuels that are produced from biomass, such as plant matter and animal waste. New materials can be developed using bioprocesses, such as bioplastics and biocomposites. Bioprocesses can also be used to clean up contaminated environments and to reduce pollution.
Which of the following is an example of a bioprocess used in the production of vaccines?
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Fermentation
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Distillation
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Extraction
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Chromatography
A
Correct answer
Explanation
Fermentation is a bioprocess that uses microorganisms, such as bacteria or yeast, to convert raw materials into desired products. In the production of vaccines, fermentation is used to grow the microorganisms that are used to produce the vaccine. The microorganisms are then killed or inactivated, and the vaccine is purified and packaged.
What is the traditional method for making vinegar?
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Distillation
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Fermentation
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Oxidation
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Reduction
B
Correct answer
Explanation
Vinegar is traditionally made through the fermentation of alcoholic liquids, such as wine, beer, or cider, by acetic acid bacteria.
What is the process of reducing vinegar called?
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Evaporation
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Fermentation
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Oxidation
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Distillation
A
Correct answer
Explanation
Reducing vinegar involves simmering it until some of the water evaporates, concentrating its flavor and acidity.
What is the process of making a vinaigrette dressing called?
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Emulsification
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Fermentation
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Reduction
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Oxidation
A
Correct answer
Explanation
Making a vinaigrette dressing involves emulsifying oil and vinegar, creating a smooth and flavorful dressing.
Which of the following is NOT a common type of bioprocess model?
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Kinetic models
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Thermodynamic models
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Metabolic models
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Equilibrium models
D
Correct answer
Explanation
Equilibrium models are not commonly used in bioprocess modeling as they assume that the system is always in equilibrium, which is often not the case in dynamic bioprocesses.
What is the process of oxidizing tea leaves called?
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Fermentation
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Oxidation
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Aging
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Ripening
B
Correct answer
Explanation
Oxidation is a controlled process where tea leaves are exposed to air, allowing enzymes to react with the leaves, resulting in the development of color, flavor, and aroma.
What is the traditional method of producing vinegar?
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Distillation
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Fermentation
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Oxidation
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Carbonation
B
Correct answer
Explanation
Vinegar is traditionally produced through a fermentation process, where microorganisms, such as bacteria or yeast, convert the alcohol in a liquid (usually wine or cider) into acetic acid. This process is facilitated by exposing the liquid to oxygen, allowing the microorganisms to thrive and produce vinegar.
What is the process of reducing vinegar to concentrate its flavor called?
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Maceration
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Reduction
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Oxidation
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Carbonation
B
Correct answer
Explanation
Reduction is the process of simmering vinegar over low heat until it thickens and its flavors become more concentrated. This technique is often used to create flavorful glazes, sauces, and dressings.