FOOD PROCESSING AND PRESERVATION
FERMENTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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aerobic
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anaerobic
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facultative
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None of the above
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Detailed explanation-1: -Bacteria that require oxygen to grow are called obligate aerobic bacteria.
Detailed explanation-2: -They require a minimum level of oxygen for growth, about 1%–10%, well below the 21% found in the atmosphere. Examples of obligate aerobes are Mycobacterium tuberculosis, the causative agent of tuberculosis and Micrococcus luteus, a gram-positive bacterium that colonizes the skin.
Detailed explanation-3: -Similarly, “aerobic” pathways for hydrocarbon degradation are employed by (per)chlorate-reducing bacteria, which are known to produce oxygen from chlorite ( C l O 2 − ) .
Detailed explanation-4: -Examples of obligately aerobic bacteria include Mycobacterium tuberculosis (acid-fast), Pseudomonas aeruginosa (Gram-negative), Bacillus (Gram-positive), and Nocardia asteroides (Gram-positive).