What is generated during the process of cyclic electron transport around P700?
Cyclic electron transport Utilizing the energy of P700+, the cyclic pathway creates a proton gradient useful for the production of ATP, while no NADPH is produced, since the protein ferredoxin does not become reduced.
What does P700 do in photosynthesis?
1 Overview. P700 oxidation in photosystem I (PSI) is a robust mechanism that suppresses the production of reactive oxygen species (ROS) and is indispensable for the growth of photosynthetic organisms.
What does cyclic electron flow produce?
In cyclic electron flow (CEF), electrons are recycled around photosystem I. As a result, a transthylakoid proton gradient (ΔpH) is generated, leading to the production of ATP without concomitant production of NADPH, thus increasing the ATP/NADPH ratio within the chloroplast.
When electrons are in a cyclic flow using photosystem I and P700 is oxygen produced is NADPH produced explain?
Non-cyclic Electron Flow. Under certain conditions, the photoexcited electrons take an alternative path called cyclic electron flow, which uses photosystem I (P700) but not photosystem II (P680). This process produces no NADPH and no O2, but it does make ATP.
Where does P700 obtain its electrons in order to be reduced?
Photo-oxidized P700 (P700+) is reduced with electrons from PSII via the Cyt b6/f complex and PC (or Cyt c6) in photosynthetic linear electron flow (Jensen et al., 2007).
Does the cyclic electron transport produce ATP?
Cyclically flowing electrons result in the production of ATP (because protons are pumped into the thylakoid lumen), but do not result in the production of NADPH (because electrons are not passed to NADP + ^+ +start superscript, plus, end superscript reductase).
How much ATP is produced in cyclic photophosphorylation?
2 ATP molecules
Cyclic photophosphorylation produces 2 ATP molecules.
Which of these types of photosystems is called the P700 why is it being called P700?
Both photosystems contain many pigments that help collect light energy, as well as a special pair of chlorophyll molecules found at the core (reaction center) of the photosystem. The special pair of photosystem I is called P700, while the special pair of photosystem II is called P680.
What produces both ATP and NADPH?
Photosynthesis takes place in two distinct stages. In the light reactions, energy from sunlight drives the synthesis of ATP and NADPH, coupled to the formation of O2 from H2O. In the dark reactions, so named because they do not require sunlight, the ATP and NADPH produced by the light reactions drive glucose synthesis.
What is P700 absorption maxima?
In PS-II the reaction centre chlorophyll-a a) has an absorption peak at 700 nm hence, is called P700 In PS-I the reaction centre chlorophyll-a has b) an absorption maxima at 680 nm and is called P680 c) The spitting of water molecule is associated with PS-1 d) Photosynthems-I and II are involved in Z scheme.
What is the absorption maxima of P700?
How is ATP generated?
ATP is also formed from the process of cellular respiration in the mitochondria of a cell. This can be through aerobic respiration, which requires oxygen, or anaerobic respiration, which does not. Aerobic respiration produces ATP (along with carbon dioxide and water) from glucose and oxygen.
How many ATP are produced in cyclic electron transport?
In cyclic photophosphorylation 2 ATP molecules are produced per cycle.
How many ATP and NADPH are produced in cyclic photophosphorylation?
One cycle produces 1 ATP and 2 NADPH2. Cyclic photophosphorylation produces 2ATP in each cycle.
Where does the P700 get its missing electron?
When light energy is absorbed by pigments and passed inward to the reaction center, the electron in P700 is boosted to a very high energy level and transferred to an acceptor molecule. The special pair’s missing electron is replaced by a new electron from PSII (arriving via the electron transport chain).
How is 36 ATP formed in aerobic respiration?
Out of 36 ATP molecules produced per glucose molecule during respiration. Explanation: Out of 36 ATP molecules 2 are produced in glycolysis outside mitochondria and the rest of the ATP molecules are produced inside mitochondria in the Krebs cycle and electron transport chain (respiratory chain).
When and where ATP is produced?
The majority of ATP synthesis occurs in cellular respiration within the mitochondrial matrix: generating approximately thirty-two ATP molecules per molecule of glucose that is oxidized.
How many ATP molecules are formed for electron during cyclic photophosphorylation?
The number of ATP molecules formed during cyclic phosphorylation are Six.
How many ATP and NADPH are produced in non cyclic photophosphorylation?
Non-cyclic photophosphorylation produces 1 ATP and 2 NADPH2 molecules.