Table of Contents
What is the immediate source of electrons for electron transfer phosphorylation?
The media source for electrons in electron transfer phosphorylation is NADH. Glucose and pyruvate are oxidized to yield the necessary electron.
What is the source of the electrons in the 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.
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.
What is the source of electrons in the light reactions?
Light reactions occur when plants synthesize food from carbon dioxide and water, referring specifically to the part of energy production that requires light and water to generate electrons needed for further synthesis. Water provides the electrons by splitting into hydrogen and oxygen atoms.
What is the immediate source of energy used to synthesize ATP by oxidative phosphorylation?
During oxidative phosphorylation, electrons derived from NADH and FADH2 combine with O2, and the energy released from these oxidation/ reduction reactions is used to drive the synthesis of ATP from ADP.
What is the source of electrons for the electron transport chain quizlet?
The immediate source of electrons for the electron transport chain is: electron carriers and ATP. During glycolysis, pyruvate oxidation, and the citric acid cycle, the chemical energy in glucose is transferred to: anaerobic.
What is mitochondrial electron transport chain?
The mitochondrial electron transport chain (ETC) consists of five protein complexes integrated into the inner mitochondrial membrane. The TCA cycle in the mitochondrial matrix supplies NADH and FADH2 to the ETC, each of which donates a pair of electrons to the ETC via Complexes I and II respectively.
Where does the electron transport chain occur?
The electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. It occurs in mitochondria in both cellular respiration and photosynthesis.
Why do electrons move down the electron transport chain?
Explanation: The direct purpose of moving electrons down the electron transport chain is to pump protons (hydrogen ions) into the intermembrane space. This creates a chemiosmotic gradient that the cell uses to generate ATP by selectively allowing hydrogen ions to move back into the mitochondrial matrix.
What is the source of electrons?
Electrons are present in all matter, but in an electrical circuit, there must be a source of high-energy electrons. This source is often a) dry cell, wet cell, or battery from which the high-energy electrons can flow, and then be returned after their energy is used.
What is the source of electrons in photosystem 1?
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.
What happens to the electrons in the light reaction?
During the light-dependent reactions, an electron that’s excited in PSII is passed down an electron transport chain to PSI (losing energy along the way). In PSI, the electron is excited again and passed down the second leg of the electron transport chain to a final electron acceptor.
What is the immediate direct source of energy for ATP synthesis by ATP synthase?
The direct source of energy for ATP synthesis is an electrochemical gradient of protons (Δp) generated initially by electron transfer complexes across the mitochondrial, chloroplast or bacterial membrane.
What is the immediate source of the energy used to synthesize ATP by oxidative phosphorylation and eukaryotic cells?
Beginning with energy sources obtained from their environment in the form of sunlight and organic food molecules, eukaryotic cells make energy-rich molecules like ATP and NADH via energy pathways including photosynthesis, glycolysis, the citric acid cycle, and oxidative phosphorylation.
What is the source of energy that directly drives ATP production in Chemiosmosis *?
The chemiosmotic theory The theory suggests essentially that most adenosine triphosphate (ATP) synthesis in respiring cells comes from the electrochemical gradient across the inner membranes of mitochondria by using the energy of NADH and FADH2 formed from the breaking down of energy-rich molecules such as glucose.
Which of the following best explains the electron transport chain?
Which of the following best describes the electron transport chain? Electrons pass from one carrier to another, releasing a little energy at each step. Bacteria have no membrane-enclosed organelles. However, some still generate ATP through cellular respiration.
What is the final electron acceptor in the electron transport chain in animals?
Oxygen is the final electron acceptor in the electron transport chain, which allows for oxidative phosphorylation.
Which one of the following best describes the electron transport chain?
chapter six chapter quiz Question Answer Which one of the following best describes the electron transport chain? Electrons pass from one carrier to another, releasing a little energy at each step. During respiration in a eukaryotic cell, reactions of glycolysis occur _______. in the cytosol.
What does the electron transport chain do in the cellular respiration process?
The primary task of the last stage of cellular respiration, the electron transport chain, is to transfer energy from the electron carriers to even more ATP molecules, the “batteries” which power work within the cell.
What is electron transport chain in biochemistry?
The electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. It occurs in mitochondria in both cellular respiration and photosynthesis.
Where is the electron transport chain located in cellular respiration?
The electron transport chain is the last stage of the respiration pathway. It is the stage that produces the most ATP molecules. The electron transport chain is a collection of carrier proteins found on the inner membrane of mitochondria.
What are the steps of electron transport?
Step 1: Generating a Proton Motive Force. Step Two: ATP Synthesis via Chemiosmosis. Step Three: Reduction of Oxygen. Summary: Oxidative Phosphorylation.
How is energy released in the electron transport chain?
Energy is released during cell metabolism when ATP is hydrolyzed. This happens when electrons are passed along the chain from protein complex to protein complex until they are donated to oxygen forming water. ATP chemically decomposes to adenosine diphosphate (ADP) by reacting with water.
