A B C D Stage 1: Light energy is absorbed and stored in temporary chemical bonds. Low-energy electrons are removed from ? and boosted to high energy levels. The energized electrons flow through an electron transport chain. Stage 2: The stored energy in bonds is used to make organic molecules. High-energy electrons from ? are transferred to CO2. Overall, electrons flow from ? to CO2. Because electron carriers exist in very small amounts, NADPH must be oxidized to NADP+ in order for the light- ? reactions to continue to occur.
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Light energy is absorbed by chlorophyll and other pigments, and this energy is used to boost electrons to a higher energy level. These electrons are then passed along an electron transport chain, which is a series of proteins embedded in the thylakoid membrane of Show more…
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3) Photosynthesis is broadly comprised of two stages: the light reactions and synthesis reactions. What are the reactants and products of each stage? 4a) Are electrons themselves transferred from pigment-to-pigment in Photosystem II? Explain your answer. 4b) Once the electrons hit the special chlorophyll describe what happens in the light reactions. Use the following words: redox, electron transport chain, primary electron acceptor, water split(ting), proton gradient ATP synthase, thylakoid space, stroma, NADPH.
Adi S.
1. Light-dependent reactions take place in the chlorophyll-containing _______ membrane. 2. ATP exists as a chain of carbon atoms with _______ groups attached to it. 3. _______ molecules present in chloroplasts are split to release oxygen atoms, electrons, and free hydrogen ions. 4. _______ is the process by which phosphate groups get cleaved off of ATP. 5. _______ use the substances in the environment around them to obtain nutrition. 6. Light-independent reactions use ATP and NADPH to convert carbon dioxide into _______. 7. Explain the basic steps in the first half of photosynthesis (light-dependent reactions). Describe the movement of electrons and the importance of hydrogen ions in developing a proton gradient that allows for ATP production.
Sri K.
________Photosystem II is bombarded with sunlight ________Reaction center chlorophyll in photosystem II is excited ________Primary electron acceptor of photosystem II grabs the excited electron ________The excited electron cascades down the electron transport chain, leading to the pumping of H+ and ultimately the "charging" of ATP molecules via ATP synthase. ________Photosystem I is bombarded with sunlight ________Reaction center chlorophyll in photosystem I is excited ________Primary electron acceptor of photosystem I grabs the excited electron ________The excited electron cascades down the electron transport chain, leading to the "charging" of an NADPH molecule.
Sulav P.
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