Food Science and Microbiology Quiz
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Questions and Answers

What is the primary concern for food scientists regarding genetically engineered foods?

  • The potential for adverse health effects on humans (correct)
  • The ethical implications of manipulating food sources
  • The potential for unintended consequences on the environment
  • The impact on the genetic diversity of food crops

    • What is the primary focus of 'hurdle intervention' in food microbiology?

  • To enhance the shelf life of food products by minimizing spoilage
  • To eliminate harmful pathogens from food through multiple barriers (correct)
  • To reduce the growth of beneficial microbes in food production
  • To develop new methods for preserving food without using heat or chemicals

    • Which of the following is NOT a direct application of food engineering principles?

  • Optimizing energy use in food production
  • Identifying new sources of food ingredients (correct)
  • Designing equipment for processing cassava and yam
  • Developing new methods for food preservation

    • Which of the following is NOT a microbe associated with food spoilage or foodborne illness?

    <p>Yeast</p> Signup and view all the answers

    What is the primary role of food engineering in the food industry?

    <p>Ensuring the safety and quality of food products</p> Signup and view all the answers

    Which of these is NOT a reason to pasteurize food?

    <p>To eliminate all microorganisms, including those beneficial to the final product</p> Signup and view all the answers

    Which of the following food products is NOT produced through a fermentation process?

    <p>Rice</p> Signup and view all the answers

    What is the principle behind pasteurization?

    <p>To kill harmful bacteria and prevent the growth of harmful leftover bacteria via additional methods</p> Signup and view all the answers

    Which of the following is a concern related to food engineering from the farm to the consumer?

    <p>The environmental impact of food packaging</p> Signup and view all the answers

    Which of the following is NOT a key focus of food microbiology?

    <p>Studying the nutritional content of food products</p> Signup and view all the answers

    Which of the following is NOT a method of pasteurization?

    <p>Microwave Heating</p> Signup and view all the answers

    What is the main goal of sterilization?

    <p>To eliminate all microorganisms and make the product shelf stable</p> Signup and view all the answers

    Based on the text, what is the typical temperature and pressure used for sterilization?

    <p>121.5°C at 1.01 kg/sqcm steam pressure</p> Signup and view all the answers

    Which of these is NOT considered a commercially sterile product?

    <p>Freshly Baked Bread</p> Signup and view all the answers

    Why is it important to line tin-coated steel containers used for canning?

    <p>To prevent the food from reacting with the metal</p> Signup and view all the answers

    How does the temperature required for canning vary for different foods?

    <p>Higher temperatures are required for neutral foods</p> Signup and view all the answers

    What is the primary reason for food trade between countries?

    <p>To ensure a fair distribution of food resources.</p> Signup and view all the answers

    What is the term used to describe the type of malnutrition that occurs due to poverty and results in stunted growth?

    <p>Relative malnutrition</p> Signup and view all the answers

    Which of the following countries primarily uses imported cassava for industrial purposes?

    <p>India</p> Signup and view all the answers

    What is the key distinction between grain legumes and cereal grains?

    <p>Grain legumes are a good source of protein, while cereal grains are mainly a source of carbohydrates.</p> Signup and view all the answers

    What is the primary cause of marasmic denutrition?

    <p>Insufficient calorie intake leading to severe weight loss.</p> Signup and view all the answers

    Which statement accurately describes the international trade of grain legumes in Nigeria?

    <p>Grain legume trade in Nigeria is primarily local, with limited exports or imports.</p> Signup and view all the answers

    What is the primary impact of hypocalorific diets on adults?

    <p>Progressive weight loss and muscle wasting.</p> Signup and view all the answers

    Which of the following is an example of a tropical root tuber used in livestock feed?

    <p>Cassava</p> Signup and view all the answers

    What is a primary source of sewage contamination in agricultural areas?

    <p>Domestic activities and industrial waste</p> Signup and view all the answers

    Which of the following diseases is NOT associated with sewage contamination?

    <p>Diabetes</p> Signup and view all the answers

    What method can be used to estimate the extent of sewage contamination in water?

    <p>Biochemical Oxygen Demand (BOD)</p> Signup and view all the answers

    Which type of bacteria is most associated with food handlers and processors?

    <p>Staphylococcus</p> Signup and view all the answers

    What should be the primary focus of personnel in food handling to prevent contamination?

    <p>Maintaining personal hygiene</p> Signup and view all the answers

    How can sewage affect aquatic organisms like shellfish?

    <p>Make them highly toxic</p> Signup and view all the answers

    During which stage can food contamination occur?

    <p>Before harvesting, during handling, and processing</p> Signup and view all the answers

    Which of the following is a major vector for transmitting human pathogens?

    <p>Raw foods contaminated by sewage</p> Signup and view all the answers

    During which phase of microbial growth is there a rapid increase in the number of cells, with a constant growth rate?

    <p>Exponential Phase</p> Signup and view all the answers

    What happens to the growth rate of microbes during the Negative Acceleration Phase?

    <p>Growth rate decreases.</p> Signup and view all the answers

    What is the main characteristic of the Lag Phase?

    <p>No apparent growth.</p> Signup and view all the answers

    Which phase of microbial growth sees the highest rate of cell division?

    <p>Exponential Phase</p> Signup and view all the answers

    In which phase of microbial growth does toxic waste accumulation begin to significantly impact the growth rate?

    <p>Negative Acceleration Phase</p> Signup and view all the answers

    What is the primary reason for the slowing down of the growth rate during the Negative Acceleration Phase?

    <p>Insufficient supply of nutrients.</p> Signup and view all the answers

    Why is understanding microbial growth curves important for food safety?

    <p>To predict the rate of spoilage in different foods.</p> Signup and view all the answers

    What is the primary difference between vegetative cells and spores in regards to microbial growth?

    <p>Spores are more resistant to environmental stresses than vegetative cells.</p> Signup and view all the answers

    Which of the following is NOT a listed source of contamination for food through soil?

    <p>Windblown sand</p> Signup and view all the answers

    What is the primary source of contamination for the internal flesh of animals?

    <p>The environment is relatively sterile</p> Signup and view all the answers

    Which microbial genera are commonly found on plant surfaces as a result of soil contamination?

    <p>Corynebacterium, Pseudomonas, Alcaligenes, and Bacillus</p> Signup and view all the answers

    Which of the following foods are NOT mentioned as being susceptible to contamination from soil microbes?

    <p>Dairy products</p> Signup and view all the answers

    Which of the following is NOT a specific mode of transmission mentioned for soil microbes to food?

    <p>Contaminated packaging materials</p> Signup and view all the answers

    What are the primary microorganisms responsible for the spoilage of fruits, vegetables, cereals, and oilseeds?

    <p>Lactic acid bacteria and molds</p> Signup and view all the answers

    Which of the following areas of animals are typically sterile?

    <p>Internal flesh</p> Signup and view all the answers

    What is the primary concern for the presence of microbes in the nose and throat of animals?

    <p>They can cause disease under stressful conditions.</p> Signup and view all the answers

    Study Notes

    Introduction to Food Science and Technology

    • Course code is ABN 220
    • The material is property of Distance Learning Centre, University of Ibadan

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    ABN 220 Introduction to Food Science and Technology PDF

    Description

    Test your knowledge on key concepts in food science, microbiology, and engineering. This quiz covers topics such as genetically engineered foods, pasteurization, fermentation processes, and the role of food engineering in the industry. Challenge yourself and discover what you know about food safety and preservation techniques.

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