Where do the replacement electrons for the reaction center of photosystem II come from?
In photosystem II, the electron lost from the reaction center is replaced with an electron that comes from water. When two water molecules are split, four electrons and four protons are released.
Where do replacement electrons come from in photosystem I?
Photosystem I obtains replacement electrons from the electron transport chain. ATP provides the energy and NADPH provides the hydrogen atoms needed to drive the subsequent photosynthetic dark reaction, or Calvin cycle.
Where do the electrons come to replace the electrons lost in photosystem II during the light dependent reaction?
Once an electron is lost, each photosystem is replenished by electrons from a different source. The PSII reaction center gets electrons from water, while the PSI reaction center is replenished by electrons that flow down an electron transport chain from PSII.
Where does the electron come from in photosynthesis?
What is the source of electrons in photosynthesis? In photosynthesis water is the source of electrons and their final destination is NADP+ to make NADPH.
How does a plant replace excited electrons in photosystem II?
First vertical bar: Photosystem II electrons are energised by light (electrons replaced by photolysis of water molecules)
Where do photosystems get their electrons?
Photosystem I receives electrons from plastocyanin or cytochrome c6 on the lumenal side of the thylakoid membrane and uses light energy to transfer them across the membrane to ferredoxin on the stromal side. It can also function in a cyclic electron transport pathway.
Where do the electrons in the electron transport chain come from in photosynthesis?
The electron transport chain is a series of electron transporters embedded in the inner mitochondrial membrane that shuttles electrons from NADH and FADH2 to molecular oxygen. In the process protons are pumped from the mitochondrial matrix to the intermembrane space and oxygen is reduced to form water.
Where does the supply of electrons come from?
Where does the supply of electrons come from and where do they end up at the end of L-D set of reactions? It comes from splitting water molecules and the electrons end up reducing NADP+ into NADPH. What are the products results specifically from photosystem 1 and photosystem 2? The products are O2, ATP, and NADPH.
What is the source of electrons in photosynthesis?
In photosynthesis, water is the source of electrons and their final destination is NADP+ to make NADPH. In mitochondria, NADH/FADH2 are electron sources and H2O is their final destination.
What is the source of electrons for the chloroplast electron transport chain?
What is the initial source of electrons for the chloroplast electron transport chain? The reaction center contains a pair of chlorophyll a molecules with a special property. Those two chlorophylls can undergo oxidation upon excitation; they can actually give up an electron in a process called a photoact .
Where does the supply of electrons come from and where do they end up at the end of light dependent set of reactions?
Where does the supply of electrons come from and where do they end up at the end of LD set of reactions? comes from the splitting of water and ends up in NADPH+.
What is the source of electrons?
Finally, the electron source can be either organic (organotrophs), inorganic (lithotrophs), or water (aquatrophs).
Where do the electrons come from in photosynthesis?
In (a) photosystem II, the electron comes from the splitting of water, which releases oxygen as a waste product. In (b) photosystem I, the electron comes from the chloroplast electron transport chain discussed below.
Where do the electrons in photosynthesis come from?
What is the source of electrons in photosynthesis? In photosynthesis water is the source of electrons and their final destination is NADP+ to make NADPH.
Where do electrons come from in a circuit?
As mentioned above, charge carriers in the wires of electric circuits are electrons. These electrons are simply supplied by the atoms of copper (or whatever material the wire is made of) within the metal wire.
Where does free electrons come from?
Most free electrons are formed with low kinetic energy, and they simply diffuse through the gas, taking part in the random thermal motion of all the atoms. Some free electrons are formed with enough kinetic energy to cause additional excitation and ionization.
Where do the electrons come from in a solar panel?
Photovoltaics turn photons into electrons by what is called the “photovoltaic” effect, (photo meaning light, and voltaic meaning electricity). In the photovoltaic effect, rays of photons in the sunlight strike the surface of the silicon semiconductor material liberating free electrons from the materials atoms.
Where do the electrons come from?
Electrons can be created through beta decay of radioactive isotopes and in high-energy collisions, for instance when cosmic rays enter the atmosphere. The antiparticle of the electron is called the positron; it is identical to the electron except that it carries electrical charge of the opposite sign.
Where do electrons come from in circuit?
As mentioned above, charge carriers in the wires of electric circuits are electrons. These electrons are simply supplied by the atoms of copper (or whatever material the wire is made of) within the metal wire.
How are electrons replaced in solar panels?
Photovoltaics turn photons into electrons by what is called the “photovoltaic” effect, (photo meaning light, and voltaic meaning electricity). In the photovoltaic effect, rays of photons in the sunlight strike the surface of the silicon semiconductor material liberating free electrons from the materials atoms.
Where do electrons come from?
Electrons can be created through beta decay of radioactive isotopes and in high-energy collisions, for instance when cosmic rays enter the atmosphere. The antiparticle of the electron is called the positron; it is identical to the electron except that it carries electrical charge of the opposite sign.
Where do free electrons come from?
Most free electrons are formed with low kinetic energy, and they simply diffuse through the gas, taking part in the random thermal motion of all the atoms. Some free electrons are formed with enough kinetic energy to cause additional excitation and ionization.
Where do the electrons come from in solar panels?
Photovoltaics turn photons into electrons by what is called the “photovoltaic” effect, (photo meaning light, and voltaic meaning electricity). In the photovoltaic effect, rays of photons in the sunlight strike the surface of the silicon semiconductor material liberating free electrons from the materials atoms.
Where do the electrons come from in induction?
Where did the electrons come from? The electrons escape from the metal atom leaving the metal atoms positively charged. The delocalized electrons form a "sea" of electrons in the metal.
Where do electrons come from in an electric circuit?
As mentioned above, charge carriers in the wires of electric circuits are electrons. These electrons are simply supplied by the atoms of copper (or whatever material the wire is made of) within the metal wire.
Where are the electrons coming from?
Electrons can be created through beta decay of radioactive isotopes and in high-energy collisions, for instance when cosmic rays enter the atmosphere. The antiparticle of the electron is called the positron; it is identical to the electron except that it carries electrical charge of the opposite sign.
Where do electrons come from in electron transport chain?
All of the electrons that enter the transport chain come from NADH and FADH 2start subscript, 2, end subscript molecules produced during earlier stages of cellular respiration: glycolysis, pyruvate oxidation, and the citric acid cycle.
Where do electrons come from in mitochondria?
It occurs in mitochondria in both cellular respiration and photosynthesis. In the former, the electrons come from breaking down organic molecules, and energy is released. In the latter, the electrons enter the chain after being excited by light, and the energy released is used to build carbohydrates.
How are electrons transported to the membrane at the beginning of the electron transport?
Metabolic processes use NADH and (FADH2) to transport electrons in the form of hydride ions (H-). These electrons are passed from NADH or (FADH2) to membrane bound electron carriers which are then passed on to other electron carriers until they are finally given to oxygen resulting in the production of water.
Where does electron transport chain occur in mitochondria?
inner mitochondrial membrane Electron transport chain (ETC) occurs in the inner mitochondrial membrane, where the OXPHOS takes place through the action of ATP synthase, (37).