Table of Contents
What energy does photosystem 2 produce?
Photosystem II is the first membrane protein complex in oxygenic photosynthetic organisms in nature. It produces atmospheric oxygen to catalyze the photo-oxidation of water by using light energy.
What are the products of photosystem II?
|Term Energy||Definition The ability to do work|
|Term What are the product(s) of photosystem II?||Definition oxygen ATP|
|Term What are the product(s) of photosystem I?||Definition NADPH|
|Term When does photolysis occur?||Definition photosystem II|
|Term When does photophosphorylation occur?||Definition photosystem II|
What happens in photosystem 2 when light enters?
When light is absorbed by one of the pigments in photosystem II, energy is passed inward from pigment to pigment until it reaches the reaction center. There, energy is transferred to P680, boosting an electron to a high energy level (forming P680*).
What happens in photosystem II?
Photosystem II is the first link in the chain of photosynthesis. It captures photons and uses the energy to extract electrons from water molecules. First, when the electrons are removed, the water molecule is broken into oxygen gas, which bubbles away, and hydrogen ions, which are used to power ATP synthesis.
What does photosystem II do?
Photosystem II (PSII) is a membrane protein supercomplex that executes the initial reaction of photosynthesis in higher plants, algae, and cyanobacteria. It captures the light from the sun to catalyze a transmembrane charge separation.
Where does the energy for photosystem II come from?
Photosystem II. Photosystem II captures the energy from sunlight and uses it to extract electrons from water molecules. Photosystem II from cyanobacteria. The membrane is shown schematically in gray.
How are photons absorbed and used in photosynthesis?
A photon is absorbed by one of the pigment molecules and transfers that energy by successive flourescence events to neighboring molecules until it reaches the action center where the energy is used to transfer an energetic electron to an electron acceptor.
Where are the electrons placed in photosystem II?
Finally, the electrons are placed on a carrier molecule, NADPH, which delivers them to enzymes that build sugar from water and carbon dioxide. The reaction center of photosystem II.
How does the first stage of photosynthesis collect energy?
Photosystem I. It collects energetic electrons from the first stage process which is powered through Photosystem II and uses the light energy to further boost the energy of the electrons toward accomplishing the final goal of providing energy in the form of reduced coenzymes to the Calvin cycle.