Question
can you help me with 23 - 33, please.
23. Conversion of to sufde and sufatn A, thiosultate sulfide exidation C. sulfur disproporti 24 B sulfate reduction D, sutur lihotrophy Which of the follow is denitrification? ing A ammonia D, nitrate to dnitr rogen to C nitrate to ammonia ammonia 25. The most oxidized form of carbon is A, CD, B, co c, co CH E. CH, reduced form of carbon is: 27, why do extreme halophilesneed such hwh amounts of Na As to stabil C. to counteract high E. A and B B. to stabilize cell walls as an electron 2B, why do extreme halophies need such high of K? A to stabilue ribosomes c counteract high [Na'i A and C 29. B. to stabilize cell walls D as an electron accept The microorganisms in the above question are A Archaea B. Bacteria c. Eukarya D they can be any of these 30. Bacteriorhodopsin isin the: A. membrane as part of an ETs B, membrane but not part of an ETS D. periplasm 31. Bacteriorhodopsin can convert light energy to ATP by A. substrate leve phosphorylation reverse electron transport B oxidative phosphorylation D, none of these 32 How do some bacteria get rid of mercu A they reduce it B. they convert it from a very toxic form to a less toric torm hey convert to a volatile form that moves away D. they metabolize it in both the near emironment and the cytoplasm E all of the above 33. Minimata disease was named after a terrible event in which A. a campany in Japan knowingly put toxic mercury into mata Bay 8, acompany in Japan put slightly toxic mercury into Minimata Bav believing it would not be a problem c bacteria methylated mercury when it got to the sedment in the Bay D. bacteria demethylated mercury which went back into the er E. both B and C tagether occurred
Explanation / Answer
1. Sulfate-reducing bacteria are those bacteria and archaea that can obtain energy by oxidizing organic compounds or molecular hydrogen while reducing sulfate to hydrogen sulfide. Most sulfate-reducing bacteria can also reduce other oxidized inorganic sulfur compounds, such as sulfite, thiosulfate, or elemental sulfur. So, the answer is option B.
2. Denitrification is the conversion of nitrates (NO3) to inert nitrogen gas (N2). It is the final step in the nitrogen cycle. The answer is option D.
3. Carbon dioxide is the most oxidized form of carbon. So, the correct answer is option A.
4. The most reduced form of carbon methane. So, the correct answer is option E.
