Does cyclic photophosphorylation use ATP synthase?
Cyclic photophosphorylation This transport chain produces a proton-motive force, pumping H+ ions across the membrane and producing a concentration gradient that can be used to power ATP synthase during chemiosmosis.
How is ATP produced during non cyclic photophosphorylation?
In a process called non-cyclic photophosphorylation (the “standard” form of the light-dependent reactions), electrons are removed from water and passed through PSII and PSI before ending up in NADPH. This process requires light to be absorbed twice, once in each photosystem, and it makes ATP .
What does photosystem 1 do in photosynthesis?
Photosystem I is an integral membrane protein complex that uses light energy to catalyze the transfer of electrons across the thylakoid membrane from plastocyanin to ferredoxin. Ultimately, the electrons that are transferred by Photosystem I are used to produce the high energy carrier NADPH.
How ATP is formed in cyclic photophosphorylation?
Cyclic photophosphorylation involves only Photosystem I and generates ATP but not NADPH. As the accumulating protons in the thylakoid interior space pass back across the thylakoid membrane to the stroma through ATP synthetase complexes, this energy is used to generate ATP from ADP and Pi (Figure 18.7B.
How does ATP synthase produce ATP?
ATP synthase forms ATP from adenosine diphosphate (ADP) and an inorganic phosphate (Pi) through oxidative phosphorylation, which is a process in which enzymes oxidize nutrients to form ATP. ATP synthase is found in all lifeforms and powers all cellular activities.
Where are ATP synthase complexes located in a plant cell?
thylakoid membrane
In eukaryotes, the ATP synthase complex is located in the inner membrane of mitochondria, with ATP synthesis reaction occurring on the membrane side toward matrix compartment. In plants, the enzyme is in addition localized in the thylakoid membrane of chloroplasts, with the ATP-forming-moiety facing the stroma.
Which of these phosphorylates ADP to ATP?
Terms in this set (10) ATP synthase phosphorylates ADP.
Does photosystem 2 produce ATP?
Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP. Electron transport through photosystem II is thus coupled to establishment of a proton gradient, which drives the chemiosmotic synthesis of ATP.
What is the purpose of photosystem 1 and 2?
Photosystem 1: The main function of the photosystem 1 is NADPH synthesis. Photosystem 2: The main function of the photosystem 2 is ATP synthesis and hydrolysis of water.
How many ATP are formed in cyclic photophosphorylation?
Therefore, H+/ATP = 4.67, e-/NADPH + H+ = 2, Total ATP release in both photphosphorylation during evolution of an oxygen molecule = 3, total NADPH + H+ during evolution of an oxygen molecule at PS-II = 2 Therefore, ATP/NADPH formation from cyclic photophosrylation at P680 = 7/9 (instead of the expected 3/2) and ATP …
How many ATP molecules are formed from oxidative phosphorylation?
For example, oxidative phosphorylation generates 26 of the 30 molecules of ATP that are formed when glucose is completely oxidized to CO2 and H2O.
How does ATP synthase produce ATP quizlet?
How does ATP synthase produce ATP? Atp synthase allows H+ ions to pass thru the thylakoid membrane,and the Atp synthase rotates, creating the energy to bind Adp and a phosphate group to produce Atp.