1) In the first step of the ETC, an NADH molecule arrives at protein Complex I, also called NADH dehydrogenase. Complex I receives two electrons from NADH, oxidizing it to NAD+. One hydrogen is pumped into the intermembrane space for each electron. This yields a total of two hydrogens per NADH molecule.
What is the electron acceptor in humans?
We humans use oxygen as the terminal electron acceptor for the ETCs in our cells. … That process – because oxygen is used as the terminal electron acceptor – is called aerobic respiration.
Is the final acceptor of electrons in respiratory chain?
The final electron acceptor during the electron transport chain in respiration is oxygen.
What is the relationship between the electron transport chain and oxygen?
Explanation: Oxygen serves as the terminal electron acceptor for the electron transport chain. Electrons are donated by NADH molecules and passed through several different proteins to generate the proton gradient in the intermembrane space.
What is the final product of oxidative phosphorylation?
-The transfer of an electron to molecular oxygen combines with H+ to form water is marked as an end product in the oxidative phosphorylation pathway. So, the correct answer is, ‘ATP+H2O. ‘
Is oxygen an electron acceptor?
Oxygen is the final electron acceptor in this respiratory cascade, and its reduction to water is used as a vehicle by which to clear the mitochondrial chain of low-energy, spent electrons. The enzyme that catalyzes this process, cytochrome oxidase, spans the mitochondrial membrane.
What is a good electron acceptor?
Oxygen (O2) is the best electron acceptor and is used in many aerobic reactions (reactions with oxygen). Hydrogen gas (H2) is a good electron donor.
Is water an electron acceptor?
In the combustion reaction of gaseous hydrogen and oxygen to produce water (H2O), two hydrogen atoms donate their electrons to an oxygen atom. … Oxygen is an oxidizing agent (electron acceptor) and hydrogen is a reducing agent (electron donor).
What is the purpose of the electron transport chain?
The electron transport chain is used to pump protons into the intermembrane space. This establishes a proton gradient, allowing protons to be pumped through ATP synthase in order to create ATP.
What are the two products in the electron transport chain?
Web Link. 2.5 ATP/NADH and 1.5 ATP/FADH2 are produced in 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).
How does the electron transport chain work?
The electron transport chain is a series of proteins embedded in the inner mitochondrial membrane. … Protons flow down their concentration gradient into the matrix through the membrane protein ATP synthase, causing it to spin (like a water wheel) and catalyze conversion of ADP to ATP.
What is the final electron acceptor in the electron transport chain of aerobic respiration?
In aerobic respiration, the final electron acceptor (i.e., the one having the highest or most positive redox potential) at the end of the ETS is an oxygen molecule (O2). This is reduced to water (H2O) by the final ETS carrier complex, which includes a terminal oxidase and usually, a cytochrome.
Is the final electron acceptor of the electron transport chain quizlet?
Oxygen is the final electron acceptor, and it has the highest affinity for electrons. When oxygen accepts an electron, it is reduced to water.
What makes oxygen a good electron acceptor?
Oxygen is a good electron acceptor because it has high degree of electronegativity.
Is pyruvate an electron acceptor?
Pyruvate typically serves as the final electron acceptor during fermentation.
Is NADH an electron acceptor?
Like the food molecule, NADH functions as an electron donor. The electron transporters embedded in the mitochondrial membrane are oxidoreductases that shuttle electrons from NADH to molecular oxygen, another electron acceptor. … NADH undergoes a reverse reaction, converting back to NAD+.
Is an electron acceptor reduced?
electron acceptor: An electron acceptor is a chemical entity that accepts electrons transferred to it from another compound. It is an oxidizing agent that, by virtue of its accepting electrons, is itself reduced in the process.
Is Fad an electron acceptor?
In the citric acid cycle, FAD is electron acceptor during oxidation of succinate. Succinate undergoes dehydrogenation to form fumarate with the help of membrane based enzyme succinate dehydrogenase. FADH2 (reduced flavin adenine dinucleotide) is produced.
Is oxygen the final electron acceptor in oxidative phosphorylation?
Given its greater availability in the atmosphere, elemental oxygen is used as the final electron acceptor in oxidative phosphorylation.
What are the major products of oxidative phosphorylation?
Overall, the process produces the 2 pyruvate plus 2 molecules of water, 2 ATP, 2 molecules of NADH, and 2 hydrogen ions (H+). The NADH carries electrons to the oxidative phosphorylation step of cellular respiration, which occurs inside of the mitochondrion.
What is the main product of oxidative phosphorylation?
The products of oxidative phosphorylation are ATP, NAD+, and FAD+.
What are the final products of the electron transport chain and oxidative phosphorylation?
The end products of the electron transport chain are water and ATP. A number of intermediate compounds of the citric acid cycle can be diverted into the anabolism of other biochemical molecules, such as nonessential amino acids, sugars, and lipids.