The net equation for oxidative phosphorylation can be written as 2NADH + 2 H+ + O2 →2 H2O + 2 NAD+. Write an analogous equation for the light reactions of photosynthesis.
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The net equation for oxidative phosphorylation can be written as 2NADH + 2 H+ + O2 →2 H2O + 2 NAD+. Write an analogous equation for the light reactions of photosynthesis.
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- The Relative Efficiency of ATP Synthesis in Noncyclic versus Cyclic Photophosphorylation If noncyclic photosynthetic electron transport leads to the translocation of 7 H+/2e- and cyclic photosynthetic electron transport leads to the translocation of 2 H+/e-, what is the relative photosynthetic efficiency of ATP synthesis (expressed as the number of photons absorbed per ATP synthesized) for noncyclic versus cyclic photophosphorylation? (Assume that the CF1CF0-ATP synthase yields 3 ATP/14 H+.)Explain the reciprocal nature of the net chemical reactions for photosynthesis and respiration.Identify the oxidized and reduced forms of the following pairs: O2/H2O NO2- / NO3- NADP+ / NADPH FMN / FMNH2 α-ketoglutarate / isocitrate ___________________________________________________________________________ In photosynthesis, where in the chloroplast does the accumulation of protons occur as a result of the electron transport? Is this answer lumen of thylakoids?
- When grown anaerobically on glucose, yeast (S. cerevisiae) converts pyruvate to acetaldehyde, then reduces acetaldehyde to ethanol using electrons from NADH. Write the equation for the second reaction, and calculate its equilibrium constant at 25 °CA substantial amount of energy is put into the photosynthetic electron transport to extract electronsf from water and to elevate the energy level of ferredoxin to a very strong reductant. The amount of energy in one NADPH is 218 kJ.mol-1. What is the percentage of this energy conserved in NADPH for the production of one mole of oxygen? What happened to the rest of the energy?To reduce six molecules of carbon dioxide to one molecule of glucose via photosynthesis, how many molecules of NADPH and ATP are required?
- Is it reasonable to list standard reduction potentials for the reactions of photosynthesis? Why or why not?Plants convert carbon dioxide and water to glucose 1C6H12O62 and oxygen in the process of photosynthesis. Write a balanced equation for this reaction, and determine how many moles of CO2 are required to produce 15.0 mol of glucose.Under standard conditions, NADH reoxidation by the electron-transport chain has a free-energy change equal to –220 kJ/mol. With 100% efficiency, how many ATP could be synthesized under standard conditions? What is the "actual" efficiency given these numbers?
- The reversible reaction shown here is part of the Calvin cycle, a pathway in photosynthetic organisms. Which glycolytic reaction does this reaction resemble and what type of enzyme catalyzes it?Assume that 2.5 ATPs are generated per NADH and 1.5 ATPs per FADH2. How many ATPs are generated from the FADH2 and NADH molecules from each repetition of the ββbeta-oxidation pathway? Express your answer as an integer.Write the overall net reaction for photosyynthetic Co2 fixation. (Take into account both light and cark reaction of photosynthesis?)
