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Photosynthesis
Storyboard Text
- Hey plant are you hungry?
- Nah man. I got infinite food.
- You see the sun is what supplies me with the energy to eat and breathe. Inside of my cells, there are chloroplasts, and inside of those there are many thylakoids surrounded by my stroma.
- It all starts on the membrane of the thylakoid. In something called photosystem ||, protons from the sun are absorbed in chlorophyll and give energy to electrons. These electrons then split the H2O in the surrounding stroma into hydrogen ions and oxygen. The oxygen gets filtered out through my stoma. The exited electrons then move along the electron transport chain while H+ ions are moved into the inner thylakoid space.
- Then the excited electrons reach photosystem |. Here the protons once again get absorbed by the chlorophyll, and the light energy is used to re-energize the electrons. Something called NADP+ then picks up these electrons, turning it into NADPH. From there, H+ ions move from the inner thylakoid space through the ATP synthase into the stroma. This turns ADP back into ATP.
- Then comes along an entirely new cycle called the Calvin Cycle. This cycle starts with 6 CO2 molecules. These molecules combine with RuBp, a 5-carbon molecule. The enzyme RuBisco then converts them into 12 3-carbon molecules (G3P). From there ATP and NADPH energize the molecules. 2 of the 12 molecules are then combined to form glucose. From there the ten remaining 3-carbon molecules get converted into six 5-carbon molecules (RuBp) and the cycle repeats.
- Wow! It's crazy how a little plant can do so much!
- Thanks man, I do my best.
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