What is the function of photosystem II quizlet?
What is the function of photosystem II quizlet?
Photosystem II triggers chemiosmosis and ATP synthesis in the chloroplast. Electrons are passed from the reduced pheophytin to an electron transport chain in the thylakoid membrane. This ETC is similar in structure and function to the ETC in mitochondria.
What happens at photosystem II?
Photosystem II obtains replacement electrons from water molecules, resulting in their split into hydrogen ions (H+) and oxygen atoms. The oxygen atoms combine to form molecular oxygen (O2), which is released into the atmosphere. The hydrogen ions are released into the lumen.
What is photosystem II in biology?
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.
What is the difference between photosystem 1 and 2 quizlet?
Photosystem 1 has p700 chlorophyll a as reaction center. Second choice is instead of passing electrons down ETC pass electron to ferodoxin and then to NADP reductase which reduces NADP to NADPH.
What is the purpose of photosystem 1 and 2?
Photosystem I and photosystem II are the two multi-protein complexes that contain the pigments necessary to harvest photons and use light energy to catalyse the primary photosynthetic endergonic reactions producing high energy compounds.
Which is a role of photosystem II in the light reactions?
What is the role of photosystem 1 and 2?
What is a photosystem 1 and 2?
What is photosystem II How does it differ from photosystem I?
The key difference between both the photosystems – Photosystem I and photosystem II is that PS I tends to absorb light of longer wavelengths > 680nm, whereas PS II absorbs light of shorter wavelengths <680 nm.
What is difference between photosystem 1 and photosystem 2?
What is the purpose of two photosystems?
The two photosystems responsible for charge transfer, oxygen evolution, and NADP+ reduction/CO2 fixation in oxygenic photosynthesis are arranged in a linear electron transfer chain (Figure 2) in which electron transfer is initiated by water serving as the electron donor to the PSII reaction center.
Does photosystem 2 produce ATP?
This is accomplished by the use of two different photosystems in the light reactions of photosynthesis, one to generate ATP and the other to generate NADPH. Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP.
How are photosystem I and II different?
The main difference between photosystem 1 and 2 is that PS I absorbs longer wavelengths of light (>680 nm) whereas PS II absorbs shorter wavelengths of light (<680 nm).
What are the parts of photosystem 2?
Photosystem II contains at least nine different redox components (chlorophyll, pheophytin, plastoquinone, tyrosine, manganese, iron, cytochrome b559, carotenoid and histidine) which have been shown to undergo light- induced electron transfer.