Photosynthesis takes place in the chloroplast. It involves light-dependent reactions -electron transporter chain- that occur in the thylakoid membrane, and light-independent reactions in the stroma - Calvin cycle-.
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Let us first describe the structures that compose the chloroplast.
- In the image, we can see the outer and inner membrane of the organelle.
- Between the external and internal membranes, we can see the intermembrane space.
- The space surrounded by the inner membrane is the stroma.
- The structures found in the stroma are the thylakoids, arranged in piles known as grana.
- Thylakoids are also surrounded by a membrane.
- The interior of thylakoids is the thylakoid space.
Now, let us talk about photosynthesis
Photosynthesis involves two stages: light-dependent and light-independent reactions.
- Light-dependent reactions refer to the non-cyclin pathway –electron transporter chain- that takes place in the thylakoid membrane.
- During light-dependent reactions, oxygen is released, while ATP and NADPH are produced. Both of them are used during light-independent reactions.
- Light-independent reaction is known as the Calvin cycle, and it takes place in the stroma.
- During the Calvin cycle, sugars or carbohydrates are synthesized.
- When carbón dioxide, CO₂, enters the leaves through stomas, it diffuses to the chloroplast stroma.
- Carbon atoms fixate, meaning that they incorporate into organic molecules. These molecules are used to produce 3-C sugars.
- The whole process is impulsed by ATP and NADPH coming from light-dependent reactions.
In the attached files you will see one image showing the structures of the chloroplast and a second image showing the movement of molecules.
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Learn more about photosyntesis at the following link:
https://brainly.com/question/774815?referrer=searchResults
https://brainly.com/question/17632381?referrer=searchResults
