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Photosystem 1
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In photosynthesis the source of electrons is?
The electrons come from water. In the light dependent stage water is split into hydrogen ions (H+), electrons and oxygen. The electrons are passed on to chlorophyll, the H+ ions combine with NADP to form NADPH and the oxygen is released.
What does NADPH add to the Calvin cycle?
NADPH donates high-energy electrons to the Calvin cycle, specifically to help reduce carbon dioxide into carbohydrates. These electrons come from the light-dependent reactions in photosynthesis and are crucial for the production of sugars in plants.
What does energy come from to make nadaph in light reactions?
From electrons in photosystem I that are excited to a higher energy state by photons of light. Then NADP + is reduced to become NADPH
What is the source of the electrons that reduce one 3-bisphosphoglyceric acid?
The electrons that reduce 1,3-bisphosphoglyceric acid come from NADH or FADH2 molecules generated during the Krebs cycle or glycolysis. This reduction reaction is catalyzed by glyceraldehyde-3-phosphate dehydrogenase.
What is the fate of electrons in noncyclic photophosphorylation?
The electrons released by P700 of PS-I in the presence of light are taken up by the primary acceptor and are then passed on to ferredoxin (Fd), plastoquinone (PQ), cytochrome complex, plastocyanin (PC) and finally back to P700 i.e., electrons come back to the same molecule after cyclic movement.
In noncyclic photophosphorylation what is the ultimate acceptor of electrons that have been produced from the splitting of water?
Carbon dioxide is a noncyclic photophosphorylation and is the ultimate acceptor of electrons that have been produced from the splitting of water. A product of both cyclic and noncyclic photophosphorylation is ATP.
Where does the energy come from to make nadph in the lighte reactions?
from energy used in light.
Where do electrons come from and how it gains energy during the light reaction?
They come from Photosystem ll. Photosystem ll gets them by ripping the electrons off of water by a process called photolysis. Electrons gain energy first in Photosystem ll, then later in photosystem l, through the absorption of energy from light.
What does the energy come from to make NADPH in the light reaction?
Photosystem 1
What electrons are in photosynthesis?
In photosynthesis, electrons are transferred through a series of proteins in the thylakoid membrane of chloroplasts. These electrons come from water molecules and are used to drive the production of ATP and NADH, which are important molecules for the light-dependent reactions of photosynthesis.
Where does the plant get its energy from photosynthesis?
1 Light and water are absorbed 2 Water splits into hydrogen, oxygen, and electrons 3 The electrons get excited by the light energy and shoot up to the next level (the electron acceptor) 4 the electron comes back down and produces ATP 5 The electrons get excited again and shoot up to the electron acceptor 6 they come down and make NADPH 7 ATP and NADPH (making a sugar that is not yet glucose, but G3P) from the light reactions provide energy that are used to convert G3P to glucose and other materials
What are the differences between cyclic and noncyclic electron flow?
in non-cyclic the electrons do not return the source and the cyclic the electrons come back to the source. Mostly the non-cyclic process occurs to produce ATP AND NADH which will be used by the Calvin cycle to produce the carbohydrate but some times there occurs a cyclic process to produce ATP to cope up with Calvin cycle as it requires more ATP than the NADH In addition to the above, cyclic electron flow could operate independent of photosystem II. The production of oxygen and NADPH take place in non-cyclic electron flow and the system could switch to cyclic flow upon accumulation of oxygen and NADPH
