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Electrons that chlorophyll loses to the electron transport chain are replenished by what molecules?
Wiki User
∙ 12y ago
Water molecules. The water is split and electrons from it are used to replace the electrons in the chlorophyll pigment.
Wiki User
∙ 12y ago
Wiki User
∙ 7y agoPhotolysis occurs (the splitting of water) and the extra electrons from that are sent back to the chlorophyll. The oxygen left over is released into the atmosphere.
Wiki User
∙ 12y agoElectrons are supplied by H20
Wiki User
∙ 13y agowater
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What does the electron transport train produce?
The electron transport chain is used to make ATP.
Does chlorophyll transport sugars?
yes
When water molecules are split in plants where do the electrons and hydrogens ions go?
Electrons are used to replenish the electrons lost by the photosystems (electrons in photosystems are lost to the electron transport chain and eventually end up in NADPH). The protons are used by the proton pumps in the electron transport chain to create the proton gradient, which drives ATP synthesis.
Where does the electron transport chain get the high-energy electrons that are passed down the chain?
The high-energy electrons that are passed to the electron transport chain combine with O2 and H+ ions. This results to the formation of water molecules.
On average how many ATP molecules are produced as each pair of high-energy electrons moves down the electron transport chain?
About 1 electron.--------------------------------The question is unclear and makes no sense to this Ph.D physical chemist. Please restate (or have restated) your question in understandable English.The first "answer" above (About 1 electron.) is not my answer. Please note that the units of energy related to energetic electrons is in eV or electron Volts or something equivalent.
Why do high-energy electrons need carrier molecules?
The energy in light raises some of the electrons in chlorophyll to higher energy levels. These high-energy electrons are used in photosynthesis. Electron carriers are used to transport the electrons from chlorophyll to other molecules during photosynthesis.
What causes the electrons to become excited and move into the electron transport chain?
In photosynthesis, the electrons from the chlorophyll are excited by the sunlight
How is the splitting of water used to produce ATP?
The electrons from water are taken by the special chlorophyll a molecules in Photosystem II. This energy is what creates ATP in the Electron Transport Chain in addition to NADPH.
Why does a pure chlorophyll flouresces when exposed to light?
Chlorophyll molecules become excited when photons of light strike them. This excitement results in valence electrons moving to a higher energy level. The electrons are transferred through many pigments called antenna pigments until they reach a pigment called the Reaction Center. Normally, the Reaction Center would pass these electrons on to an electron transport chain, but, since pure chlorophyll does not have any electron transport chains, the electrons, which are highly unstable, simply return to their original energy level. Energy is released as the return, and this energy is what we see as fluorescent light.
Where do the electrons come from that are processed in the electron transport chain?
Hydrogen molecules of water
What is passing of electrons through a series of protein molecules is called?
Electron Transport Chain
What converts sunlight into sugars?
Photosynthesis that is where The energy-fixing reaction of photosynthesis begins when light is absorbed in photosystem II in the thylakoid membranes. The energy of the sunlight, captured in the P680 reaction center, activates electrons to jump out of the chlorophyll molecules in the reaction center. These electrons pass through a series of cytochromes in the nearby electron-transport system. After passing through the electron transport system, the energy-rich electrons eventually enter photosystem 1. Some of the energy of the electron is lost as the electron moves along the chain of acceptors, but a portion of the energy pumps protons across the thylakoid membrane, and this pumping sets up the potential for chemiosmosis. The spent electrons from P680 enter the P700 reaction center in photosystem I. Sunlight now activates the electrons, which receive a second boost out of the chlorophyll molecules. There they reach a high energy level. Now the electrons progress through a second electron transport system, but this time there is no proton pumping. Rather, the energy reduces NADP. This reduction occurs as two electrons join NADP and energize the molecule. Because NADP acquires two negatively charged electrons, it attracts two positively charged protons to balance the charges. Consequently, the NADP molecule is reduced to NADPH, a molecule that contains much energy. Because electrons have flowed out of the P680 reaction center, the chlorophyll molecules are left without a certain number of electrons. Electrons secured from water molecules replace these electrons. Each split water molecule releases two electrons that enter the chlorophyll molecules to replace those lost. The split water molecules also release two protons that enter the cytoplasm near the thylakoid and are available to increase the chemiosmotic gradient.
What is the importance of release of electrons from chlorophyll occurring during photosynthesis of plants?
to create energy. as electrons are realeased from the water in the chlorophyll they get excited from the sunlight and create energy. later these electrons are taken by NADPH and FADH2 (the electron transport train) and used to create ATP in ATP synthase after the Krebs cycle
Series of molecules down which excited electrons are passed in a thyakoid membrane?
electron transport chain
The energy of the electrons passing along the electron transport chain is used to make what?
ATP molecules
Is the beginning of photosynthesis pigments in photosystem absorb light?
Yes, that is correct. The light energy excites electrons in photosystems and these electrons enter the electron transport chain to make ATP. These electrons eventually end up in NADPH and photosystems are replenished with electrons obtained from splitting water.
Why doesnt chlorophyll run out of electrons during the electron transport chain?
The reduced quinone (QH2) is reoxidized to Q by complex III of the respiratory electron-transport chain (Section 18.3.3).
