Which of the following accessory pigments is the first e- acceptor in the electron transport chain? A. plastoquinone B. ferredoxin C. pheophytin D. plastocyanin
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Which of the following accessory pigments is the first e- acceptor in the electron transport chain?
A. plastoquinone
B. ferredoxin
C. pheophytin
D. plastocyanin
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- Which of the following statements is FALSE? Group of answer choices: - Plastoquinone has a higher reduction potential than plastocyanin. - Water is the ultimate electron donor. - Proton gradient is created in the light phase of photosynthesis wherein the pH in the stroma is higher than in the lumen. - Photosystem II has chlorophylls in its reaction center that has maximum light absorption at 680 nm.To identify the molecule that accepts CO2, Calvin and Benson manipulated the carbon-fixation cycle by either cutting off CO2 or cutting off light from cultures of photosynthetic algae. They then measured the concentrations of various metabolites immediately following the manipulation. How would these experiments help identify the CO2 acceptor? Select one: a. The CO2 acceptor concentration would decrease when the CO2 is cut off, but increase when the light is cut off. b. The CO2 acceptor concentration would increase when the CO2 is cut off, but decrease when the light is cut off. c. The CO2 acceptor concentration would decrease when either the CO2 or light are cut off. d. The CO2 acceptor concentration would increase when either the CO2 or light are cut off.Which of the following processes during photosynthesis is incorrectly coupled to its typical location? Select one: a. Rubisco catalyzes carbon fixation—stroma b. ATP is produced via ATP synthase—thylakoid lumen c. NADPH is oxidized to NADP+—stroma d. Oxygen gas is produced by splitting of water—thylakoid lumen e. Activated P680 donates an electron to the primary electron acceptor—thylakoid membranes
- A key experiment that helped put doubts to rest regarding the chemiosomotic theory used an artificial vesicle, a light activated proton pump, and ATP synthase. Which of the following are true about this experiment? (select all that apply) Group of answer choices The inside of the vesicle is more negatively charged when the light is turned on ATP production would decrease if the proton pump was not included in the experiment Adding UCP1 into the experiment would increase ATP production ATP production increases when the light is turned on The pH inside the vesicle decreases when the light is turned on The final stage of the electron transport chain is the transfer of the electrons to ATP synthase. Group of answer choices True False Complex I can accept electrons from NADH using binding sites on both the matrix and intermembrane space sides of the inner mitochondrial membrane Group of answer choices True False Different iron-sulfur clusters can have different…Define the following terms:a. glyoxosomeb. coenzyme Ac. NAD(P)+d. FADe. FMNExplain why this statement is correct. The energy associated with ATP synthesis in eukaryote cells originates as light absorbed by chlorophyll of a cell
- A drug forms a channel in the thylakoid membrane. Given this scenario, which of the following statements are true? O a. A large portion of the drug must be non-polar O b. Electron transport will stop C Protons will move into the stroma O d. The membrane protein behaves as an active transporterIn the Light Reaction of Photosynthesis, the sun excites electrons in pigment molecules in the photosystems. These excited electrons and (H+ ions) go through electron transport systems. Keep in mind that if this process continued as stated, the pigment molecules would run out of electrons, but fortunately there is a way in which the excited electrons are replaced. Explain how the electrons are ultimately replaced and what the important byproduct is.You have discovered a novel peptide that, when administered to plant cells, spontaneously inserts into the thylakoid membranes and forms a channel that lets protons cross the membrane. You treat plant cells growing normally with your peptide. Which of the following statements correctly describes the effect on photosynthesis shortly after the addition of the peptide? Select all that are true. a. The rate of Glyceraldehyde 3-phosphate synthesis will decrease b. The rate of oxygen production will be unaffected c. The rate of Glyceraldehyde 3-phosphate synthesis will increase d. The rate of oxygen production will decrease e. The rate of oxygen production will increase f. The rate of Glyceraldehyde 3-phosphate synthesis will be unaffected
- Which of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correctLooking at the image shown here, which of the following statements DOES NOT correctly identifies the location of metabolites related to photosynthesis and/or respiration in the diagram of Chlamydomonas? F G H O A. Fermentation occurs in D. B. Glyceraldehyde-3-phosphate (G3P) is generated in C. O C. ATP can be found in D. D. Pyruvate is generated in G. O O OPlace the following components in order to trace the path that electrons take through the light reactions. Water PSII primary electron acceptor NADP*/NADPH P680 First electron transport chain Second electron transport chain P700 PSI primary electron acceptor
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