Here is question 4 with the answer: Colon bacteria that produce H2S produce actu

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.

HELPFUL LINKS:

Beano, (http://www.beanogas.com)

Lactaid Product Information, (http://www.lactaid.com/)

Alphagalactosidase, enzyme-facts.com (http://www.enzyme-facts.com/alpha-galactosidase.html)

Lactase (Beta-Galactosidase), Great Vista Chemicals (http://www.greatvistachemicals.com/biochemicals/lactase.html)

Why Baked Beans Make You Fart and What to Do About It (http://flatulencecures.com/baked-beans-fart)

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.

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