Electron Transport Chain.
A sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions
that release energy used to make ATP.
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 does the electron transport chain do?
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.
What is the electron transport chain and what is its function?
The electron transport chain is a series of electron transporters embedded in the inner mitochondrial membrane that
shuttles electrons from NADH and FADH
2
to molecular oxygen
. In the process, protons are pumped from the mitochondrial matrix to the intermembrane space, and oxygen is reduced to form water.
Does the electron transport chain require oxygen?
Explanation:
Oxygen is the final electron acceptor in the electron transport chain
, which allows for oxidative phosphorylation. Without oxygen, the electrons will be backed up, eventually causing the electron transport chain to halt.
How many steps are in the electron transport chain?
Steps of the ETC
There are
four major
complexes in the chain. The electrons are passed through Complex I and II first. As this happens, protons are pumped across the inner mitochondrial membrane and into the intermembrane space. A carrier called Ubiquinone Q picks up the electrons and takes them to Complex III.
Why is the electron transport chain so important?
The ETC is the most important stage of cellular respiration from an energy point of view
because it produces the most ATP
. … When a cell needs energy, it breaks the third phosphate group bond and uses the resulting energy.
What is the electron transport chain made up of?
The electron transport chain is composed of
four protein complexes
, which are embedded in the inner membrane of the mitochondrion, along with two mobile carriers (mobile carrier Q {coenzyme Q} and mobile carrier C, that shuttle electrons through the ETC. The ETC is where the greatest amount of ATP is synthesized.
How does the electron transport chain produce ATP?
The process of forming ATP from the electron transport chain is known as
oxidative phosphorylation
. Electrons carried by NADH + H
+
and FADH
2
are transferred to oxygen via a series of electron carriers, and ATPs are formed. Three ATPs are formed from each NADH + H
+
, and two ATPs are formed for each FADH
2
in eukaryotes.
Which of the following best describes the electron transport chain?
| 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 |
|---|
Where is the electron transport chain located in the mitochondria?
In eukaryotes, the electron transport chain is located in
the inner mitochondrial membrane
. In prokaryotes, it is located within the plasma membrane.
Why are the components of the electron transport chain embedded?
Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?
To generate and maintain the proton gradient essential for ATP production
.
What is the difference between oxidative phosphorylation and electron transport chain?
Oxidative phosphorylation is made up of two closely connected components: the electron transport chain and chemiosmosis. 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.
What is the role of oxygen in the electron transport chain quizlet?
Oxygen serves
as the final electron acceptor of the Electron Transport Chain
. Thus, oxygen is essential for getting rid of low-energy electrons and hydrogen ions, the wastes of Cellular Respiration. Without oxygen the Electron Transport Chain cannot function.
What is the final electron acceptor in 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 goes into the electron transport chain and what comes out?
What goes into the electron transport chain? What comes out?
A total of 10 NADH and 2 FADH2 enter the chain to drop off their electrons and H+
. 34 ATP are produced.
