What is the role of electron transport chain 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 flow of the ions back across the membrane synthesises ATP by a protein called ATP synthase. Oxygen is the final hydrogen ion and electron acceptor.
Is any ATP used in the electron transport chain?
No ATP is produced in the electron transport chain. Is any ATP used in the electron transport chain? No, the electrons provide energy. The name of the embedded protein that provides a channel for the hydrogen ions to pass through the membrane is ATP synthase.
Is FMN an electron carrier?
FMN is an electron carrier molecule that functions as a hydrogen acceptor.
How much ATP does the electron transport chain produce?
A total of 32 ATP molecules are generated in electron transport and oxidative phosphorylation.
When glucose is used as energy source the largest amount of ATP is produced in?
Terms in this set (20) Why are mitochondria so crucial to normal life? When glucose is used as as energy source, the largest amount of ATP is generated by the portion of the entire respiratory process.
Where does the electron transport chain occur?
The electron transport chain activity takes place in the inner membrane and the space between the inner and outer membrane, called the intermembrane space.
Which reactant is used in the electron transport chain?
The main biochemical reactants of the ETC are the electron donors succinate and nicotinamide adenine dinucleotide hydrate (NADH). These are generated by a process called the citric acid cycle (CAC). Fats and sugars are broken down into simpler molecules such as pyruvate, which then feed into the CAC.
Which reactant is used in the electron transport chain quizlet?
Oxygen and ADP are also reactants.
Why does the electron transport chain occur?
Steps of the ETC The electron transport chain occurs across the inner mitochondrial membrane. Its main function is to build an electrochemical gradient across the inner membrane using protons. The ETC pumps hydrogen ions out of the matrix of the mitochondria and into the intermembrane space.
How does the electron transport chain work?
In the electron transport chain, electrons are passed from one molecule to another, and energy released in these electron transfers is used to form an electrochemical gradient. In chemiosmosis, the energy stored in the gradient is used to make ATP.
Does the electron transport chain require oxygen?
The electron transport chain (Figure 1) is the last component of aerobic respiration and is the only part of glucose metabolism that uses atmospheric oxygen. Note, however, that the electron transport chain of prokaryotes may not require oxygen as some live in anaerobic conditions.
Why does the electron transport chain produce the most ATP?
During this process electrons are exchanged between molecules, which creates a chemical gradient that allows for the production of ATP. The most vital part of this process is the electron transport chain, which produces more ATP than any other part of cellular respiration.
What is the final product of the electron transport chain quizlet?
The electron transport chain is a process that moves hydrogen ions across a membrane to produce large amounts of ATP. The final step in transferring the energy of sunlight and glucose to the usable energy of ATP takes place during the electron transport chain.
What is the electron transport chain in simple terms?
The electron transport chain is a cluster of proteins that transfer electrons through a membrane within mitochondria to form a gradient of protons that drives the creation of adenosine triphosphate (ATP).
What is the purpose of the electron transport chain quizlet?
The main purpose of the electron transport chain is to build up a surplus of hydrogen ions (protons) in the intermembrane space sp that there will be a concentration gradient compared to the matrix of the mitochondria. This will drive ATP synthase.
What is the most significant feature of enzyme complex 3 of the electron transport chain?
Electron Transport – Enzyme Complex 3: The significant feature is the heme structure containing the iron ions, initially in the +3 state and changed to the +2 state by the addition of an electron.
What are the components of the electron transport chain?
The electron transport chain is also called the Cytochrome oxidase system or as the Respiratory chain. The components of the chain include FMN, Fe–S centers, coenzyme Q, and a series of cytochromes (b, c1, c, and aa3).
What is the main source of energy in the human diet?
Carbohydrates are the main energy source of the human diet. The metabolic disposal of dietary carbohydrates is direct oxidation in various tissues, glycogen synthesis (in liver and muscles), and hepatic de novo lipogenesis.
What are the major events of the electron transport chain?
The events of the electron transport chain involve NADH and FADH, which act as electron transporters as they flow through the inner membrane space. In complex I, electrons are passed from NADH to the electron transport chain, where they flow through the remaining complexes. NADH is oxidized to NAD in this process.
Which best describes 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 process produces ATP?
The process human cells use to generate ATP is called cellular respiration. It results in the creation of 36 to 38 ATP per molecule of glucose. The two ATP-producing processes can be viewed as glycolysis (the anaerobic part) followed by aerobic respiration (the oxygen-requiring part).
What is the purpose of the electron transport chain in photosynthesis?
Photosynthetic electron transport converts free and abundant solar energy into reducing power and chemical energy for producing biomass and biofuels through transferring electrons sequentially from H2O through Photosystem II and then Photosystem I to NADP+ in chloroplasts of higher plants and photosynthetic algae or in …
What produces the most ATP?
The Krebs cycle takes place inside the mitochondria. The Krebs cycle produces the CO2 that you breath out. This stage produces most of the energy ( 34 ATP molecules, compared to only 2 ATP for glycolysis and 2 ATP for Krebs cycle). The electron transport chain takes place in the mitochondria.
What starts the process of glucose breakdown?
Glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism. Glycolysis consists of an energy-requiring phase followed by an energy-releasing phase.
What is the final electron acceptor in aerobic respiration?
To carry out aerobic respiration, a cell requires oxygen as the final electron acceptor. A cell also needs a complete Krebs cycle, an appropriate cytochrome oxidase, and oxygen detoxification enzymes to prevent the harmful effects of oxygen radicals produced during aerobic respiration.