Electron transport chain (ETC) is a series of proteins and organic molecules which are located in the inner membrane of the mitochondria. In ETC electrons are passed from donor Molecule to other carrier molecule in a series of redox reactions and energy is released in form of ATP.
ETC has four electron carrier complexes as follows:
1. Complex I – It is called NADH dehydrogenase, it is composed of polypeptide chains and has several Fe-S centers.
2. Complex II: Succinate Dehydrogenase, It Transfers 2 electrons from succinate to coenzyme Q, It has 4 different protein subunits
3. Complex III: Ubiquinone Cytochrome C Oxidoreductase, which is made up of heme groups and Fe-S centers.
4. Complex IV: Cytochrome C Oxidase, It is made up of cytochromes and Fe-S centers.
ETC initiates as Complex I accepts electrons from NADH and transfers an electron. Complex II includes succinate dehydrogenase is also link between the citric acid cycle and the electron transport chain, Complexes I and II both reduced coenzyme Q,CoQH2 which is the substrate for Complex III. Complex III transfers the electrons from CoQH2 and reduces cytochrome c which is the substrate for Complex IV. Complex IV transfers the electrons from cytochrome c and reduces molecular oxygen into water.
Molecules involved in ETC:
What are the names of the four complexes in the electron transport chain? What molecules/electron carriers...
Which electron carrier brings electrons to the electron transport chain via complex II? Which electron carrier brings electrons to the electron transport chain via Complex II? FADH_2 FAD NADH NAD^+ Which electron carrier brings electrons to the electron transport chain via Complex I? FADH_2 FAD NADH NAD^+ As the electron transport chain proceeds, electrons H^+ ions water CO_2 molecules are pumped into the intermembrane space cytoplasm matrix nucleus
The electron transport chain (ETC), or respiratory chain, is linked to proton movement and ATP synthesis. Select the statements that accurately describe the electron transport chain. Choose all that apply.Prosthetic groups, such as iron-sulfur centers, are directly involved with electron transfer. The reactions of the ETC take place in the outer membrane of mitochondria. Electron carriers in the mitochondrial matrix include ubiquinone (coenzyme Q), FMN, and cytochrome c. The outer membrane of mitochondria is readily permeable to small molecules and hydrogen ions. Electrons generated...
B. The electron transport chain (ETC) consists of four protein complexes as shown in the following figure. 1. Name the complex(es) where electrons enter the ETC: 2. How many electrons are accepted at the entry point(s) per cycle? The Electron Transport Chain showing the four complexes embedded in the inner mitochondrial membrane. Barbiturates inhibits Complex I and cyanide inhibits Complex IV. 3. Barbiturates, a class of drugs, interrupt the flow of electrons in the chain by inhibiting Complex I. Cyanide,...
What is the function of cytochrome c in the electron transport chain? Question 3 of 4 To answer this question, you may reference the Metabolic Map. What is the function of cytochrome c in the electron transport chain? o It reduces two molecules of Q to QH2. It oxidizes NADH to NAD+. It oxidizes FADH2 to FAD. It transports two electrons from NADH or FADH to complex III. It transports an electron from complex III to complex IV.
The electron transport chain (ETC), or respiratory chain, is linked to proton movement and ATP synthesis. Select the statements that accurately describe the electron transport chain Choose all that apply. Electron transfer in the ETC is coupled to proton transfer from the matrix to the intermembrane space The outer membrane of mitochondria is readily permeable to small molecules and hydrogen ions. Prosthetic groups, such as iron-sulfur centers, are directly involved with electron transfer. Electron carriers in the ETC include ubiquinone...
Cellular respiration: The Electron Transport Chain The breakdown of glucose ends during the Krebs cydle; however, it is important to note that the energy previously contained in glucose is mostly stored in NADH and FADHz. In the last step of celular respiration, the high-energy electrons within NADH and FADH2 are passed within a set of proteins found in the inner membrane of the mitochondrion, collectively known as the electron transport chain. The electrons provide the energy to create ATP, which...
118) The electrons of the electron transport chain come from molecules produced during: glycolysis a) the krebs cycle b) c) sugar metabolism d) all of the above a and b only e) 119) The electrons of the electron transport chain come from: a) NAD+ b) FAD+ NADH and FADH c) all of the above d) e) a and b 120) In feedback inhibition loop, which often serves as the allosteric inhibitor? a) The enzyme b) The starting compound c) ATP...
Use the following figure to describe the electron transport chain. What is the last electron acceptor? PROCESS: ELECTRON TRANSPORT CHAIN Intermembrane space H H H H H H H + H H+ H+ H H H" H H Η* Η' H+ H" H Η" H+ H H H H H H+ H H+ H+" Η' Η' H H.com lex H+ H+ H Membrane of cristae Complex IV DODIK 6- Cytcem have for you were complex withoutwedi OD വI ( വിവാ...
What happens along an electron transport chain? What happens along an electron transport chain? Electrons are passed from a reducing agent to an oxidizing agent, releasing free energy at each step. Electrons are passed from molecule to molecule, gaining potential energy at each step. O Electrons store energy that can be used to break down sugar molecules. O Protons are pumped through ATP synthase, making ATP.
9. In the electron transport chain picture above, how do electrons move from protein complex I to protein complex II? 1. I need you to remember that "Q" is ubiquinone which gets reduced at proteins l & I, and oxidized at protein III. "Reduced" means gains electrons, "oxidized" means loses electrons. 2. I need you to remember how "Q" moves from protein I to protein Do you remember? Don't overthink it, Preeda. As far as scientists know right now, the...