In chloroplast, the site of coupled oxidation-reduction reactions is the
Outer membrane
Inner membrane
Thylakoid membrane
Stromal space
In the chloroplast, the site of coupled oxidation-reduction reactions is the photosynthetic membrane system, which includes the thylakoid membrane.
Within the chloroplasts of plant cells, photosynthesis takes place, and it involves a series of oxidation-reduction reactions. These reactions occur within the photosynthetic membrane system, which includes the thylakoid membrane.
The thylakoid membrane is a highly organized membrane system composed of flattened sac-like structures called thylakoids. It is in the thylakoid membrane where key components of the photosynthetic machinery are located, including photosystems I and II, cytochrome b6f complex, and ATP synthase.
During photosynthesis, light energy is captured by pigments in the thylakoid membrane and is used to drive electron transport chains. These electron transport chains involve a series of oxidation-reduction reactions, where electrons are transferred between molecules. This flow of electrons leads to the generation of ATP through chemiosmosis and the production of reducing power in the form of NADPH. Hence, the correct answer is option 3.