Photosystem II is the first protein complex in the light-dependent reactions of photosynthesis. This protein complex is located within the thylakoid membrane of a plant cell's chloroplast. Light photons enter the photosystem where they are captured by enzymes and used to energize electrons that will be used during photosynthesis.
The energized electrons are then transferred through a series of cofactors and coenzymes also located in the thylakoid membrane. These electrons are replaced at photosystem II with electrons from the splitting of water molecules. When the water molecules separate, lone hydrogen ions concentrate inside the thylakoid space. As the hydrogen level rises, these ions are pumped out of the thylakoid space by the enzyme ATP synthase. This action produces ATP energy, which the cell will later use during the Calvin Cycle to convert carbon dioxide into glucose.Learn More
The main difference between Photosystem I and Photosystem II is the absorption peak. According to HyperPhysics from Georgia State University, Photosystem I has an absorption peak of 700 nanometers, while Photosystem II has an absorption peak of 680 nanometers.Full Answer >
A photosystem is an aggregate of protein structures in the thylakoid membranes of plants that aids in photosynthesis. It absorbs light energy and transfers electrons onto a reaction center. Thylakoid membranes are found in the plant chloroplasts.Full Answer >
While spinach is a health food, it contains goitrogens, and eating too much of it interferes in the functioning of the thyroid gland, according to GreenCravers.com. Spinach also contains purine, and consuming too much can cause overproduction of uric acid in the body, which results in gout and kidney stones.Full Answer >
The functioning of the human leg is the result of cooperation between the muscles and bones located there. Many muscles involved in leg function are quite large and use powerful contractions to propel and support the body. In addition muscles combined with the leg's bone structure are responsible for adjusting to minute changes, thus ensuring the body remains balanced in standing, walking or running modes.Full Answer >