Which of the following approaches would be the best way to detect the lack of photosystem II in some photosynthetic organisms? Determine whether they have thylakoid membranes. Determine whether they consume CO2 in the dark. Determine whether they produce O2 in the light. Determine the action spectrum for photosynthesis in these organisms.
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Determine whether they have thylakoid membranes.
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Determine whether they consume CO2 in the dark.
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Determine whether they produce O2 in the light.
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Determine the action spectrum for photosynthesis in these organisms.
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- 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 correctIdentify the correct compound to create a chemical equation that represents Photosynthesis. + Drag and drop the right reactants and products of the Light Dependent and Light Independent (aka Dark) Reactions. Chloroplast NADPH NADP+ ADP Water - H20 Calvin Cycle Glucose - C6H1206 ATP Light Reaction Thylakoids Stroma O2 Carbon Dioxide CO2 Identify the reactants and products that are used and given off by plants and animals.Where do photosynthetic organisms get the energy needed to make sugars during the light- independent/dark reactions? They use the ATP and NADPH that are produced during the light-dependent reactions. They convert the 6-carbon sugars into 5-carbon sugars. They obtain the energy directly from the Sun. They use the ADP and carbon dioxide produced during the light-dependent reactions.
- Complete the following table to compare the electron-transport phase of cellular respiration with the light-dependent reactions of photosynthesis.Choose the CORRECT order of reactions that are conducted by photosystem I. P700 is activated by two photons → two Chl A0 accept two high-energy electrons → one quinone A1 is fully reduced → two electrons are passed on one 4Fe–4S cluster → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase takes two protons from the stroma and reduces one NADP+ P680 is activated by two photons → two Chl A0 accept two high-energy electrons → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase oxidizes one ferredoxin at a time to reduce FAD to FADH- and then to FADH2 → the proton-motive force is created P700 is activated by a photon → Chl A0 accepts two high-energy electrons → one plastoquinone QA is fully reduced → two electrons are passed on one 4Fe–4S cluster → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase takes two protons from the stroma and reduces one FAD P700 is activated by a photon → pheophytin accepts two high-energy electrons →…Choose 2 of the following terms: Z protein / ATP synthase / Photosystem II. What is the specific role of each of the following? Describe what and how the protein does its job. As well, explain the importance of each in the overall process of photosynthesis.
- Identify each statement below as True or False. * Another name for phase I of photosynthesis is electron transport. Phase I of photosynthesis stores energy in NADPH molecules. Photosynthesis takes place inside the mitochondria. Energy is stored in water molecules during phase I of photosynthesis. Phase I of photosynthesis is also known a the light- dependent reactions. Photosynthesis phase I stores energy that is used to power phase II. Phase I of photosynthesis stores energy in ATP molecules. Phase I of photosynthesis can only take place when light is available. Light is not required for phase I of photosynthesis. The process of photosynthesis takes in the chloroplasts of a cell. place True ο ο ο ο ο ο ο ο False O оPlace the following steps of the Light-Reactions of Photosynthesis in order. Production of NADPH Absorption of light Electron transport chain & Production of ATP Photosystem II Photosystem IWhich of the following defines photorespiration? The metabolic pathway by which most autotrophs use the energy of light to make sugars from carbon dioxide and water The light-independent reactions of photosynthesis Process by which electron flow through electron transfer chains sets up a hydrogen ion gradient that drives ATP formation An inefficient metabolic pathway of producing sugars that occurs when O2 attaches to rubisco
- Which of the following is produced during the light reactions of photosynthesis? C6H12O6 CO2 O2 ADPAfter electrons are raised to high energy levels in photosystem II, they travel down an electron transport chain. As they are stepped down in energy, the lost energy is used to power which process. The pumping of high energy electrons into the intermembrane space. This creates a large difference in concentration and in electric charge between the intermembrane space and the lumen of the thylakoid. When these high energy electrons rush back into the thylakoid lumen, they are forced to travel through one of the ATP synthase molecules that sits embedded in the thylakoid membrane. ATP synthase uses the flow of hydrogen ions to phosphorylate ADP, converting it to ATP. The pumping of hydrogen ions into the stroma. This creates a large difference in concentration and in electric charge between the stroma and the lumen (watery interior) of the thylakoid. When When the hydrogen ions in the stroma rush back into the thylakoid lumen, they are forced to…Prochlorococcus marina, one of the smallest prokaryotes capable of oxygenic photosynthesis, uses which of the following inorganic substrate molecules during photosystem II of photosynthesis? hydrogen sulfide diatomic oxygen elemental sulfur carbon dioxide glucose