NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In green and purple bacteria, electrons that reduce the CO2 come from ____
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C6H12O6
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CO2
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H2S
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H2O
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Explanation:
Detailed explanation-1: -In purple and green sulfur bacteria, sulfur is used as an electron donor in the form of sulfide or thiosulphate. Usually, H2S is the hydrogen donor instead of water.
Detailed explanation-2: -Green sulfur bacteria absorb longer wavelengths of light than purple sulfate bacteria. Green sulfur-reducing bacteria also occur in anaerobic, sulfate-containing environments including wetlands and overloaded facultative lagoons.
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