Here is question 4 with the answer: Colon bacteria that produce H2S produce actu
ID: 280069 • Letter: H
Question
Here is question 4 with the answer: Colon bacteria that produce H2S produce actually do so by using anaerobic respiration pathway.
7. The electron donor for H2S production using the metabolic pathway identified in Question #4 is ____(hydrogen gas/elemental sulfur/carbon dioxide/glucose), which is in a fully ____(oxidized or reduced) state in its role as an electron donor.
8. The electron acceptor for the H2S production using the metabolic identified in Question #4 is ____(hydrogen gas/elemental sulfur/carbon dioxide/glucose), which is an ____(organic or inorganic) molecule that is in a fully ____(oxidized or reduced) state in its role as the final electron acceptor.
9. Some colon bacteria can produce methane (CH4) using the same metabolic pathway you identified in Question #4. The carbon source and electron source are the same for both H2S and CH4 production, but for methane production, the final electron acceptor is _____.
a. hydrogen gas (H2)
b. elemental sulfur (S)
c. carbon dioxide (CO2)
d. glucose (C6H12O6)
10. The final electron acceptor identified in Question #9 is an ____(organic or inorganic) molecule in a fully ____(oxidized or reduced) state.
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Lactase (Beta-Galactosidase), Great Vista Chemicals (http://www.greatvistachemicals.com/biochemicals/lactase.html)
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Explanation / Answer
7) The electron donor for H2S production is carbon dioxide which is in a fully reduced state in its role as an electron donor.
8) The electron acceptor for H2S production is elemental sulfur which is an inorganic molecule that is in a fully oxidised state in its role as a final electron acceptor.
9) For methane production, the final electron acceptor is carbon dioxide.
10) The final electron acceptor, CO2 is an inorganic molecule in a fully oxidised state.