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Review of Photosynthesis definitions Flashcards

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Review of Photosynthesis definitions
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  • Light Reactions


    The process in photosynthesis where light energy is converted into chemical energy, producing ATP and NADPH through chemiosmosis and electron transport.

  • Glucose


    A simple sugar and primary energy source for cells, broken down during cellular respiration to produce ATP.

  • Chemiosmosis


    The process where ATP is generated using the energy from a proton gradient across a membrane, driven by the movement of protons through ATP synthase.

  • Substrate Level Phosphorylation


    ATP production by direct transfer of a phosphate group to ADP from a phosphorylated intermediate, occurring in glycolysis and the Krebs cycle.

  • Electron Transport Chain


    A series of protein complexes in the inner mitochondrial membrane that transfer electrons from NADH and FADH₂ to oxygen, creating a proton gradient that drives ATP synthesis.

  • Hydrogen Ion Gradient


    A difference in proton concentration across a membrane, driving ATP synthesis via chemiosmosis in cellular respiration and photosynthesis.

  • ATP Synthase


    An enzyme that synthesizes ATP from ADP and inorganic phosphate using a proton gradient across a membrane during cellular respiration and photosynthesis.

  • NADPH


    A reduced electron carrier produced in the light reactions of photosynthesis, essential for transferring electrons and providing reducing power for biosynthetic reactions.

  • Photosystem


    A complex of proteins and pigments in chloroplasts that absorbs light energy to drive the light reactions of photosynthesis, producing ATP and NADPH.

  • Oxygen Gas


    A diatomic molecule essential for aerobic respiration, acting as the final electron acceptor in the electron transport chain, resulting in the formation of water.