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Review questions for lecture 9

Review questions for lecture 9 - Review questions for...

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Review questions for lecture 9 Be comfortable with the following terms: Autotrophic pathway Assimilation Dissimilation Reverse electron flow Lithoautotrophy Photolithoautotrophy Oxygenic photolithoautotrophy “Z scheme” Oxygen Evolving Complex (OEC) Heterotroph Questions from lecture. You should be able to do these very easily. An aerobic organism is oxidizing hydrogen for energy. In two sentences, describe the path of that electron through the cell, and how the organism makes ATP. The organism is an autotroph. In two sentences, describe the path of an electron from hydrogen to carbon. Is there enough information here to tell you which autotrohic pathway the organism is using? Is light involved? Draw a diagram of reaction progress for a) 4 protons entering a cell, moving down a concentration gradient. b) ADP + Pi making ATP c) The coupled reactions, catalyzed by ATPase. Draw a diagram of reaction progress for a) 3 protons leaving a cell, moving against a concentration gradient. b) ATP being hydrolyzed c) The coupled reactions, catalyzed by ATPase. What exergonic event and endergonic event are coupled by a membrane-bound oxidoreductase in an electron transport chain? Draw a reaction progress diagram for these events, and the combined events coupled by the oxidoreductase. Draw a diagram of reaction progress for letting protons into the cell through an oxidoreductase. What could you couple to this reaction? An aerobic organism is oxidizing Fe+2 at pH 0.5 for energy. In two sentences, describe the path of that electron and how the organism makes ATP. The organism is an autotroph. In three sentences, describe the path of an electron from iron to carbon. How do you know it uses the Calvin cycle?
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