The main difference between substrate level phosphorylation
What is the link between oxidation and phosphorylation?
Oxidative phosphorylation is the process in which ATP is formed as a result of the transfer of electrons from NADH or FADH
2
to O
2
by
a series of electron carriers
. This process, which takes place in mitochondria, is the major source of ATP in aerobic organisms (Figure 18.1).
Why is it called oxidative phosphorylation?
In the mitochondrion, what the proton gradient does is facilitate the production of ATP from ADP and Pi. This process is known as oxidative phosphorylation, because
the phosphorylation of ADP to ATP is dependent on the oxidative reactions occurring in the mitochondria
.
What are the two similarities between oxidative phosphorylation and photophosphorylation?
The similarities of photophosphorylation to oxidative phosphorylation include:
a membrane associated electron transport chain
.
creation of a proton gradient
.
harvesting energy of the proton gradient by making ATP with the help of an ATP synthase
.
What is the end 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
.
What are the stages of oxidative phosphorylation?
The three major steps in oxidative phosphorylation are (a) oxidation-reduction reactions involving electron transfers between specialized proteins embedded in the inner mitochondrial membrane;
(b) the generation of a proton (H
+
) gradient across the inner mitochondrial membrane
(which occurs simultaneously with step (a …
What is the main purpose of oxidative phosphorylation?
Oxidative phosphorylation is a highly efficient
method of producing large amounts of ATP
, the basic unit of energy for metabolic processes. During this process electrons are exchanged between molecules, which creates a chemical gradient that allows for the production of ATP.
What is oxidative phosphorylation also known as?
Oxidative phosphorylation is also known as
the electron transport chain
. It includes the reactions that result in the synthesis of ATP from ADP + Pi. Heat can also be generated when ATP production is uncoupled from the respiratory chain.
What are the products of oxidative phosphorylation?
The products of oxidative phosphorylation are
ATP, NAD+, and FAD+
.
What does oxidative phosphorylation and photophosphorylation both involve?
Explanation: Both photophosphorylation and oxidative phosphorylation (oxphos) are
processes cells use to make energy in the form of ATP
. … the electrons provide energy to pump protons (H+) to one side of the membrane. the protons flow back through a special enzyme (ATP-synthase) which makes ATP.
How are photophosphorylation and oxidative phosphorylation similar and different?
Oxidative phosphorylation involves
the reduction of O
2
to H
2
O with
electrons donated by NADH and FADH
2
, and occurs equally well in light or darkness. Photophosphorylation involves the oxidation of H
2
O to O
2
, with NADP
+
as electron acceptor, and it is absolutely dependent on light.
Does photophosphorylation require oxygen?
Under certain conditions, the photoexcited electrons take an alternative path called cyclic electron flow, which uses photosystem I (P700) but not photosystem II (P680). This process produces no NADPH and no O
2 ,
but it does make ATP. This is called cyclic photophosphorylation.
What are the two processes of oxidative phosphorylation?
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.
Which compounds are the final products of oxidative phosphorylation?
When there is a high concentration of protons on the outside of the mitochondrial membrane, protons are pushed through
ATP
synthase. This movement of protons causes ATP synthase to spin, and bind ADP and Pi, producing ATP. Finally, ATP is made!
How many ATP is produced in oxidative phosphorylation?
Oxidative phosphorylation produces
24–28 ATP molecules
from the Kreb’s cycle from one molecule of glucose converted into pyruvate.
Where does the oxidative phosphorylation occur?
Oxidative phosphorylation takes place in
the inner mitochondrial membrane
, in contrast with most of the reactions of the citric acid cycle and fatty acid oxidation, which take place in the matrix.
