FOOD PROCESSING AND PRESERVATION
FERMENTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Oxygen
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Carbon dioxide
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Sulfur
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None of the above
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Detailed explanation-1: -The bacteria are chemosynthetic. They oxidize hydrogen sulfide, add carbon dioxide and oxygen to produce sugar (food), sulfur, and water. The food that chemosynthetic bacteria produce serves as the base of the hydrothermal vent food web.
Detailed explanation-2: -All chemosynthetic organisms use energy released by chemical reactions to make a sugar, but different species use different pathways. For example, at hydrothermal vents, vent bacteria oxidize hydrogen sulfide, add carbon dioxide and oxygen, and produce sugar, sulfur, and water: CO2 + 4H2S + O2-> CH20 + 4S + 3H2O.
Detailed explanation-3: -Hydrogen sulfide chemosynthesis process Giant tube worms use bacteria in their trophosome to fix carbon dioxide (using hydrogen sulfide as their energy source) and produce sugars and amino acids. Some reactions produce sulfur: hydrogen sulfide chemosynthesis: 18H2S + 6CO2 + 3O2 → C6H12O6 (carbohydrate) + 12H2O + 18S.