Excited chlorophyll Electron Proton gradient formed for ATP carrier synthesis Excited NADP chlorophyll Electron e reductase carrier (NADPH NADP+ Reaction- center Proton pump Electron chlorophyll carrier Reaction- Radiant center chlorophyll energy Water-splitting Radiant enzyme 2 (H20 energy 4 H+ + 0, Photosystem I Proton pump Photosystem I NADP reductase O FIGURE 6.26 The Tandem Photosystems of Cyanobacteria and Chloroplasts Radiant energy captured by antennae pigments excites a reaction-center chlorophyll, causing it to emit a high-energy electron, which is then passed to an electron transport chain. In cyclic photophosphorylation, electrons emitted by photosystem I are returned to that photosystem; the path of the electrons is shown in green arrows. In non-cyclic photophosphorylation, the electrons used to replenish photosystem I are donated by radiant energy-excited photosystem Il; the path of these electrons is shown in orange arrows. In turn, photosystem Il replenishes its own electrons by stripping them from water, producing O2. Energy of electrons

Excited chlorophyll Electron Proton gradient formed for ATP carrier synthesis Excited NADP chlorophyll Electron e reductase carrier (NADPH NADP+ Reaction- center Proton pump Electron chlorophyll carrier Reaction- Radiant center chlorophyll energy Water-splitting Radiant enzyme 2 (H20 energy 4 H+ + 0, Photosystem I Proton pump Photosystem I NADP reductase O FIGURE 6.26 The Tandem Photosystems of Cyanobacteria and Chloroplasts Radiant energy captured by antennae pigments excites a reaction-center chlorophyll, causing it to emit a high-energy electron, which is then passed to an electron transport chain. In cyclic photophosphorylation, electrons emitted by photosystem I are returned to that photosystem; the path of the electrons is shown in green arrows. In non-cyclic photophosphorylation, the electrons used to replenish photosystem I are donated by radiant energy-excited photosystem Il; the path of these electrons is shown in orange arrows. In turn, photosystem Il replenishes its own electrons by stripping them from water, producing O2. Energy of electrons

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter21: Photosynthesis

Section: Chapter Questions

Problem 5P: The Relative Efficiency of ATP Synthesis in Noncyclic versus Cyclic Photophosphorylation If...

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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+.)
one < A olchs.quiz-Iti-pdx-prod.instructure.com AA 55:15 Time Remaining Return Diagram 4: The Light Reactions of Photosynthesis STROMA Jow H concentration) Cytochrome complex Photosystem II Photosystem I Light NADP reductase 4H Light NADP H NADPH THYLAKOID SPACE (high H concentration) +2 H To Calvin -Cycle Thylakold membrane ATP- synthase STROMA (low H concentration) ADP ATP Diagram 4 shows a single thylakoid membrane taken from a chloroplast inside of a leaf cell. The events of the light dependent cycle that take place along the thylakoid membrane are shown. In the Thylakoid space water is split into O 02 H* and electrons O Ht, ATP and O2 O Photosystem II, electrons and oxygen O 02 and chlorophyll Previous
Photosyntheis equation 6H20 Light C6H1206 , 602 Охудen 6CO2 Carbon dioxide Water Sugar Aerobic cellular respiration Chemical Equation - Aerobic Respiration CH1206 + 6 O2→ 6 CO2 + 6 H2O + 36 ATP Anaerobic respiration Lactic Acid Fermentation CH,20 2C,H,O, + 2 ATP Alcohol Fermentation C,H,,0 2C,H,OH + 2CO, + 2 ATP What chemical reaction happens in your body that causes you to breathe out carbon dioxide? Explain your answer by talking about the inputs and outputs of the chemical reaction. (Level 3) + tv MacBook Air DII DD 80 F8 F9 F10 F4 F5 F6 F7 F3 #3 2$ & 3 4 9. 7 Y F H J * 00 ト
Photosyntheis equation 6CO2 Carbon dioxide 6H20 Light C6H1206 , 602 Sugar Water Oxygen Aerobic cellular respiration Chemical Equation - Aerobic Respiration CH1206 + 6 O2→ 6 CO2 + 6 H;O + 36 ATP Anaerobic respiration Lactic Acid Fermentation C,HO 20C H¸O, + 2 ATP Alcohol Fermentation C,H,0 2C,H,OH + 2CO, + 2 ATP What chemical reaction happens in your body that causes you to breathe out carbon dioxide? Explain your answer by talking about the inputs and outputs of the chemical reaction. (Level 3) étv MacBook Air 80 DII DD F3 F4 FS F7 F8 F9 F10 FV # $ % & 3 4 9. 7 8 E R Y U F G H. J K L C V M B ト

"Energy Transformation" ATP-ADP CYCLE Construct a final draft sketch on the photoexcitation of Chlorophyll.With labels and explanation.
Question 6 Review the two stages of photosynthesis. Match the term and its description. Each term can only be used once. thylakoid membranes [ Choose ] stroma | Choose Convert light energy to chemical energy. Release oxygen as a by- product [ Choose | > >
In cyclic photophosphorylation, it is estimated that two electrons must bepassed through the cycle to pump enough protons to generate one ATP.Assuming that the ∆G for hydrolysis of ATP under conditions existing inthe chloroplast is about -50 kJ/mol, what is the corresponding percent efficiency of cyclic photophosphorylation, using light of 700 nm?
The Overall Free Energy Change for Photosynthetic NADP+ Reduction What is the overall free energy change (G) for noncyclic photosynthetic electron transport? 4 (700-nm photons) + 4 (680-nm photons) + 2 H2O + 2 NADP+O2 + 2 NADPH + 2H+
Why do the reaction centers have different pigments rather than only the chlorophyls? quantitatively increasing the absorption photons narrowing coverage of the visible spectrum light increasing coverage of the visible spectrum light arranging light-harvesting complexe compensating for the high density of chlorophyll
Dlagram 4: The Light Reactions of Photosynthesis STROMA ow soncedration Oytnho e mples Photoeystem B Photoeystan I NADP Light OPM THYLAKOID SPACE gh r cenentration Cavin Cyele Thylakoid membrane ATP STROMA dow H ooncentration) ythse ADP Diagram 4 shows a single thylakoid membrane taken from a chloroplast inside of a leaf cell. The events of the light dependent cydle that take place along the thylakoid membrane are shown. ight energy is captured by ATP synthase O Photosystems I and II D NADP+ reductase O The thylakoid membrane's lipid structures
The absorption spectrum of chlorophyll a differs from the actionspectrum of photosynthesis. Explain this observation.
"Energy Transformation" ATP-ADP CYCLE Answer the following questions correctly and explain your answer. 1. What wavelength of light is most important to life on earth? 2. What color/s of light does chlorophyll absorb? What color does it reflect? 3. What composes a photosystem ? 4. In what part of the photosystem does the first step of light reaction take place? 5. Differentiate the two types of photosystem.