FOOD PROCESSING AND PRESERVATION
FERMENTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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energized
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revitalized
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poisoned
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None of the above
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Detailed explanation-1: -Bacillus subtilis and Pseudomonas fluorescens are examples of decomposer bacteria. Additions of these bacteria have not been proved to accelerate formation of compost or humus in soil. Rhizobium bacteria can be inoculated onto legume seeds to fix nitrogen in the soil.
Detailed explanation-2: -The response of bacteria to oxygen is not determined simply by their metabolic needs. Oxygen is a very reactive molecule and forms several toxic by-products, such as superoxide (O2−), hydrogen peroxide (H2O2), and the hydroxyl radical (OH·). Aerobic organisms produce enzymes that detoxify these oxygen products.
Detailed explanation-3: -Oxygen Toxicity Obligate anaerobes, which live only in the absence of oxygen, do not possess the defenses that make aerobic life possible and therefore cannot survive in air. The excited singlet oxygen molecule is very reactive. Therefore, superoxide must be removed for the cells to survive in the presence of oxygen.