OXIDATIVE PHOSPHORYLATION; BIOLOGY AQA A LEVEL
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Phosphorylation by Oxidation
The last phase of aerobic respiration, known as oxidative phosphorylation, takes
place in the inner mitochondrial membrane. ADP is phosphorylated into ATP
during this process using energy from the electron transport chain. Water is also
a byproduct of the production of oxygen. The mechanism of oxidative
phosphorylation is explained by the chemiosmotic theory, which postulates that
protons are pumped across the inner mitochondrial membrane by energy from
electron transport, resulting in a proton gradient. ATP synthase then facilitates
the flow of protons back into the mitochondrial matrix, hence propelling ATP
production.
For instance, oxidative phosphorylation produces a significant amount of ATP
in a human cell during aerobic respiration, allowing the cell to perform a
number of energy-demanding functions like nerve impulse transmission and
muscular contraction.
Theory of Chemiosmotic
The most widely accepted theory for oxidative phosphorylation during aerobic
respiration is the chemiosmotic theory. This theory states that protons are
pumped through the inner mitochondrial membrane and into the intermembrane
space by energy produced by electron movement along the electron transport
chain. As protons return to the mitochondrial matrix through ATP synthase, the
resultant proton gradient propels the production of ATP.
The chemiosmotic idea, for instance, is comparable to how energy is created by
water running through a dam and then used to create electricity. Similarly, ATP
creation during oxidative phosphorylation is powered by protons moving down
their concentration gradient.
Chain of Electron Transport
REVISION TEST LATEST UPDATED
Phosphorylation by Oxidation
The last phase of aerobic respiration, known as oxidative phosphorylation, takes
place in the inner mitochondrial membrane. ADP is phosphorylated into ATP
during this process using energy from the electron transport chain. Water is also
a byproduct of the production of oxygen. The mechanism of oxidative
phosphorylation is explained by the chemiosmotic theory, which postulates that
protons are pumped across the inner mitochondrial membrane by energy from
electron transport, resulting in a proton gradient. ATP synthase then facilitates
the flow of protons back into the mitochondrial matrix, hence propelling ATP
production.
For instance, oxidative phosphorylation produces a significant amount of ATP
in a human cell during aerobic respiration, allowing the cell to perform a
number of energy-demanding functions like nerve impulse transmission and
muscular contraction.
Theory of Chemiosmotic
The most widely accepted theory for oxidative phosphorylation during aerobic
respiration is the chemiosmotic theory. This theory states that protons are
pumped through the inner mitochondrial membrane and into the intermembrane
space by energy produced by electron movement along the electron transport
chain. As protons return to the mitochondrial matrix through ATP synthase, the
resultant proton gradient propels the production of ATP.
The chemiosmotic idea, for instance, is comparable to how energy is created by
water running through a dam and then used to create electricity. Similarly, ATP
creation during oxidative phosphorylation is powered by protons moving down
their concentration gradient.
Chain of Electron Transport
