Mcb 464: Advanced Food Microbiology Quiz

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| By Ikegodswill
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Ikegodswill
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Quizzes Created: 2 | Total Attempts: 277
| Attempts: 168
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  • 1/10 Questions

    Food additives that help maintain the structures of food and food products are known as 

    • Polysaccharides 
    • Stabilizers 
    • Thickners 
    • Exopolysaccharides 
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About This Quiz

This advanced quiz explores the intricacies of food microbiology, focusing on microbial food products, starter cultures, food additives, and the impact of microorganisms on food quality.

Mcb 464: Advanced Food Microbiology Quiz - Quiz

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  • 2. 

      The use of mixed strain starter cultures  could make the final product undesirable due to some certain challenges 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The use of mixed strain starter cultures could make the final product undesirable due to certain challenges. When different strains of microorganisms are used together as starter cultures, they may compete with each other for nutrients and resources, leading to inconsistent fermentation and undesirable flavor profiles. Additionally, the presence of multiple strains increases the risk of contamination and spoilage, further compromising the quality of the final product. Therefore, it is true that the use of mixed strain starter cultures can result in an undesirable final product.

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  • 3. 

    Which of the following holds lots of advantage for the economy of any nation of the world 

    • Food spoilage 

    • Food fermentation 

    • Food borne diseases 

    • None of the above

    Correct Answer
    A. Food fermentation 
    Explanation
    Food fermentation holds lots of advantages for the economy of any nation of the world. Fermentation is a process that converts carbohydrates into alcohol, organic acids, or gases using microorganisms such as yeast or bacteria. It is widely used in the production of various food and beverage products, such as bread, cheese, yogurt, beer, and wine. These fermented products not only have longer shelf lives, reducing food spoilage and waste, but they also contribute to the economy by creating jobs in the food industry and generating revenue through exports. Additionally, fermented foods are often rich in probiotics and beneficial nutrients, promoting better health and reducing the incidence of food-borne diseases.

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  • 4. 

    All fermented foods are probiotics 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement "All fermented foods are probiotics" is false. While some fermented foods contain probiotics, not all fermented foods do. Probiotics are live bacteria or yeasts that are beneficial for our digestive system. Fermented foods are produced through a process of lacto-fermentation, where natural bacteria feed on the sugar and starch in the food, creating lactic acid. This process can result in the production of probiotics. However, not all fermented foods undergo this process or contain live beneficial bacteria, so it is incorrect to say that all fermented foods are probiotics.

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  • 5. 

    Large scale production of  microbial food products without the use of starter cultures is very possible 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement suggests that it is possible to produce microbial food products on a large scale without the use of starter cultures. However, this is not true. Starter cultures are essential for the production of microbial food products as they contain specific strains of microorganisms that provide the desired characteristics and qualities to the final product. These starter cultures help in fermentation, flavor development, and preservation of the food products. Without the use of starter cultures, it would be challenging to achieve consistency and quality in the production of microbial food products on a large scale.

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  • 6. 

    Which of the following statements is NOT true 

    •  There are functional foods can contain  both fructo-oligosaccharides and also Bifidobacterium latum

    • Functional food selective exerts  beneficial effects on the intestinal bacteria 

    •  There are functional foods that are  foods in their natural state.

    • Functional foods are all of microbial origin

    Correct Answer
    A. Functional foods are all of microbial origin
    Explanation
    The statement "Functional foods are all of microbial origin" is not true. Functional foods can come from different sources, including plants, animals, and microbial cultures.

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  • 7. 

    Consider the scenario and answer the questions that follow: Paul like taking 'tasers' . Although 'tasers' are not digestible, whenever he takes them he observes an increase in the metabolism of SOME intestinal bacteria. What kind of food is 'tasers' ?

    • Special intestinal food 

    • Prebiotics 

    • Synbiotics 

    • Probiotics 

    • Option 5

    Correct Answer
    A. Prebiotics 
    Explanation
    Tasers are considered prebiotics because they are not digestible but they promote the growth and activity of certain beneficial intestinal bacteria. Prebiotics are non-digestible fibers that serve as food for probiotics, which are the beneficial bacteria in the gut. By consuming prebiotics, Paul is providing a source of nourishment for the intestinal bacteria, leading to an increase in their metabolism. Therefore, the correct answer is prebiotics.

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  • 8. 

     An example of functional foods that can help increase the absorption  of minerals in the intestine is 

    • Probiotcs

    • Prebiotics

    • Synbiotics

    • Fermented foods 

    Correct Answer
    A. Probiotcs
    Explanation
    Probiotics are an example of functional foods that can help increase the absorption of minerals in the intestine. Probiotics are live bacteria and yeasts that are good for your health, especially your digestive system. They can help improve the balance of bacteria in your gut, which in turn can enhance the absorption of minerals such as calcium, iron, and magnesium. Probiotics can also help break down food and produce certain vitamins that aid in mineral absorption. Therefore, consuming probiotics can be beneficial for increasing the absorption of minerals in the intestine.

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  • 9. 

    Which of  the following type of starter cultures is less likely to be attacked by bacteriophages 

    • Multi-strain starters 

    • Bulk starters 

    • Heterofermentative  starter cultures 

    • Mother starters 

    Correct Answer
    A. Multi-strain starters 
    Explanation
    Multi-strain starters are less likely to be attacked by bacteriophages because they consist of multiple strains of bacteria. Bacteriophages are specific to certain strains of bacteria, so having multiple strains in the starter culture decreases the likelihood of all strains being susceptible to attack. This provides a higher chance of at least some strains surviving and continuing the fermentation process.

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  • 10. 

    Sphigomonas paucimobilis is known to produce a food additive known as 

    • Dextrans 

    • Pullans 

    • Gellans

    • Xantham gum

    Correct Answer
    A. Gellans
    Explanation
    Gellans is a food additive produced by Sphigomonas paucimobilis. Gellans are a type of microbial polysaccharide that can be used as a gelling agent, stabilizer, or thickener in food products. They have a high viscosity and can form gels at low concentrations, making them useful in a variety of food applications. Gellans are often used in dairy products, desserts, sauces, and dressings to improve texture and stability.

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  • Current Version
  • Jan 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 22, 2020
    Quiz Created by
    Ikegodswill
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