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- The following image is a schematic of the metabolic processes occurring in a plant contained in a closed container. A=Light Dependent reactions B=Glycolysis C=Light Independent Reactions D=Kreb's cycle E=electron transport chain 2a) Use the figure above to explain the conditions in which the oxygen concentration remains constant in the container. b) 2-carboxyarabinitol-1,5-bisphosphate (CABP) is an inhibitor of the enzyme rubisco. Which pathway would this affect most?a) Draw the carboxylation reaction mechanism catalyzed by Rubisco. Include the substrates, products, key amino acid residues in the active site, and important metal ions. b) Describe each step in the Rubisco carboxylation reaction and why the carbamylated lysine is critical for enzyme activity. c. Describe the purpose of the "regeneration stage" of the Calvin-Benson cycle.What is the significance that the combined absorption spectra of chlorophylls a and b roughly match the action spectrum of photosynthesis? Wouldphotosynthesis be more efficient if their individual absorption spectra coincided exactly?
- Which of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2Inorganic Nitrate (N03-) contaminated the soil around their plant. Scientists developed mechanisms for removing Nitrite (N02-) from the soil, but have not found one for Nitrate (N03-). Is there any types of bacteria that could metabolize Nitrate (N03-) to give rise to Nitrite (N02-)? Indicate ALL metabolic pathways that could be used (aerobic respiration, anaerobic respiration, aerobic chemolithotrophy, and anaerobic chemolithotrophy) to carry out this reaction? Which of these reactions can oxidize or reduce inorganic materialsThe photosynthetic process used by the green sulfur bacteria, under anaerobic conditions, is best represented by which of the following balanced equations? cell bio 6CO2 + 12H2S C6H12O6 + 6S2 + 6H2O C6H12O6 + C6H12O6 C12H22O11 + H2O 6CO2 + 12H2O C6H12O6 + 6O2 + 6H2O C12H22O11 + H2O C6H12O6 + C6H12O6 C6H12O6 + 6O2 + 6H2O 6CO2 + 12H2O
- Photorespiration is a multienzyme bypass of the Calvin cycle's CO2 fixation process in plants and all other oxygenic phototrophs. This bypass removes and recycles 2-phosphoglycolate, a damaging by- product of photosynthesis in the presence of O2, which is formed when 02 substitutes CO2 in the CO2 fixation pathway. According to a regional scale model, photorespiration currently reduces US soybean and wheat yields by 36% and 20%, respectively, and a 5% reduction in photorespiration losses would be worth around $500 million yearly in the United States. Can you forecast the costs and good advantages of C4 photosynthesis? What factors increase the likelihood that the benefits will outweigh the expenses in hot, dry areas in the United States?There is a rare microalga that has a promising future as a producer of a new type of biofuel. After research in the lab, it is found that it is having a difficult time propagating outside of its native environment, and it is identified that this is an issue with its respiration pathway. Overall ATP production is around half of expected,and you find that glycolysis isn’t producing any net ATP molecules and only one molecule of NADH. Question: Assuming that the respiration pathway is similar to other prokaryotes, where would you expect to find a nonfunctional mutation in this pathway? What is the reason for this? What could a growth strategy be that can better support this rare bacterium until you can come up with a long-term solution?Statement 1: In the Calvin Cycle, two molecules of glyceraldehyde 3-phosphate are produced if two molecules of carbon dioxide are fixed. Statement 2: If the carbon fixation phase of the Calvin Cycle begins with 6 molecules of ribulose bisphosphate and 6 molecules of carbon dioxide, 2 out of 12 molecules of glyceraldehyde 3-phosphate made at the end of the reduction phase are used in carbohydrate production while the remaining 10 molecules are needed to keep the Calvin Cycle turning by regenerating ribulose bisphosphate. Hide answer choices Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true. Both statements are true. Both statements are false
- Photorespiration is a multienzyme bypass of the Calvin cycle's CO2 fixation process in plants and all other oxygenic phototrophs. This bypass removes and recycles 2-phosphoglycolate, a damaging by- product of photosynthesis in the presence of 02, which is formed when 02 substitutes CO2 in the CO2 fixation pathway. Discuss the situation of fixing 02 (oxygen) rather than CO2 (carbon dioxide) in plants.Antimycin A (an inhibitor of electron trans port) is an inhibitor of photosynthesis in chloroplasts. Why is this likely to be so?Why is bacterial photosynthesis called anoxygenic?