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Understanding Photosynthesis: Light-Dependent and Light-Independent Reactions

This comprehensive overview of photosynthesis highlights the key processes occurring during light-dependent and light-independent reactions. In the thylakoid space, solar energy, water, and ATP are transformed into NADPH and oxygen. The light-independent reactions, or Calvin Cycle, occur in the stroma, transforming carbon dioxide into glucose using energy stored in ATP and NADPH. Discover the inputs and outputs of these critical processes and explore their significance in the context of chloroplast functionality, including where these processes take place.

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Understanding Photosynthesis: Light-Dependent and Light-Independent Reactions

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  1. PS I Light Dependent Reactions PS II Electron Transport System Electron Transport System

  2. e- H2O O2 Light Dependent Reactions Solar energy Solar energy ATP e- e- ATP e- NADPH PS II Electron Transport System Electron Transport System PS I

  3. Where are processes happening? Input & output? Light-dependent reactions ATP NADPH thylakoid space stroma cytoplasm intermembrane space

  4. Where are processes happening? Input & output? Light-dependent reactions Solar energy H2O ATP NADPH chloroplast thylakoid space O2 stroma cytoplasm intermembrane space

  5. Where are processes happening? Input & output? Solar energy Light-dependent reactions H2O ATP NADPH chloroplast O2 thylakoid space CO2 Light-independent reactions stroma cytoplasm C6H12O6 intermembrane space

  6. Photosynthesis Summary H2O O2 Light-dependent reactions light ADP NADPH ATP NADP+ Light-independent reactions (Calvin (C3) Cycle) CO2 glucose

  7. Light Independent Reactions Calvin (C3) Cycle: energy from light dependent reactions CO2 1 PGA RuBP NADPH In the stroma NADP+ 2 ADP ATP 3 ADP ATP G3P Glucose

  8. Light Independent Reactions Calvin (C3) Cycle: CO2 energy from light dependent reactions 1 PGA RuBP NADPH In the stroma NADP+ 2 ATP 3 ADP ADP G3P ATP Glucose

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