Photosynthesis A plants daily root-ine

To put it plainly, photosynthesis is the process of how plants convert sunlight into energy. But photosynthesis is anything but plain. In fact photosynthesis is a very intricate process involving many parts and steps.

light reactions: as the name implies, light reactions require sunlight; therefore, they occur during the day. Ultimately the goal of the light reactions is to produce NADPH and ATP (both needed products for the light independent reactions)

The steps of the light-dependent reactions is where things start to get confusing......

Steps: First the plant has to absorb light. (its not the light-dependent reactions for no reason) Then the chloroplasts take the light energy and convert it into NADP+ and ATP. From there electron transport takes place. (cause you need to move things over to the calvin cycle)

Electron transport: The light energy absorbed excited the electrons and splits water molecules. this releases an electron (to be used later), hydrogen (into the thylakoid), and oxygen (as a waste and into the atmosphere). Then the excited electrons (i know its been forever, but we get to use them now) move to an electron-acceptor molecule. This molecule moves said electrons into a series of carriers and into photosystem one. once light hits photosystem one the electrons get moved to ferrodoxin. Ferrodoxin finishes the job by putting the electrons onto the carrier NADP+ and thus forms NADPH.

Chemiosmosis is an important part of photosynthesis. Chemiosmosis happens at the same time as electron transport. The ATP produced at this time thanks to chemiosmosis. the protons accumulate in the thylakoid space and creates a concentration gradient.

Light-independent reactions: First carbon fixation happens. in this 6 carbon dioxide combine with 6 5-carbon compounds to form twelve 3-carbon molecules molecules called 3phosphoglycerate (3pga). Then chemical energy stored in ATP and NADPH goes to the 3PGA and forms G3P. ATP provides phosphoglycerates and NADPH gives hydrogen ions and electrons. Next 2G3P leaves the cycle to make glucose. Then rubisco converts the remaining 10 G3P into 5 carbon molecules called ribulos 1, 5 rubp. These combine with the new carbon dioxide to continue the cycle.

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