Photosynthesis PDF

**PHOTOSYNTHESIS** **Introduction:** Autotrophic organisms use the pigment chlorophyll to harvest solar energy to produce the stored energy as chemical bonds of ATP and carbohydrates. In eukaryotes, chlorophyll is associated with thylakoid membranes of the chloroplast. Photosynthesis in eukaryotes...

**PHOTOSYNTHESIS** **Introduction:** Autotrophic organisms use the pigment chlorophyll to harvest solar energy to produce the stored energy as chemical bonds of ATP and carbohydrates. In eukaryotes, chlorophyll is associated with thylakoid membranes of the chloroplast. Photosynthesis in eukaryotes involves three essential processes: - - - *Fig. 2a. The chemical reaction for photosynthesis* **During Photosynthesis**  - - - **Stages of Photosynthesis** **Light reactions** - - - **Calvin Cycle** - - - - - **Light Reactions Events** *Fig. 2.b. The Light Reactions* 1. 2. 3. 4. 5. 6. 7. 8. **Cyclic Electron Flow** Aside from the usual route of electron flow as described in the events of the light reactions (i.e., noncyclic or linear electron flow), photo-excited electrons may take a short-circuited route that utilizes Photosystem I but not Photosystem II. The ferredoxin goes back to the cycle and passes the electron to the cytochrome complex and to the Pc until it reaches P700 chlorophyll instead of transferring the electron to NADP+reductase. Due to this event, no NADPH is produced but ATP is still synthesized.  *Fig. 2.c. Cyclic Electron Flow* **The Calvin Cycle** - - - - - - - **Carbon Fixation** - - - **Reduction** - - - - - **Regeneration of RuBP** - - - - - - - - - - - **EXERCISE** Q & A Activity: 1. 2. 3. Encode your responses in the Answer Box. **PERFORMANCE TASK** For this activity, you have to gather materials that will help build a three-dimensional model that represents the events or phases of the Calvin cycle. You may use clay, Styrofoam balls, beads, or recyclable materials. Present the output via video documentation. Embed your Google Drive folder link in the Answer Box.