Respiration- Oxidative Phosphorylation

Created by: TaraCBeckworth
Created on: 28-12-16 11:10

What happens to the hydrogen atoms collected by the FAD and the NAD?

They are carried to the electron transport chains in the cristae membrane

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Describe what happens with the hydrogen atoms at the membrane

The atoms disassociate into hydrogen ions (protons) and electrons, electrons are used to synthesise ATP (chemiosmosis) and at the end of the chain the electrons & protons combine with oxygen to create water

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How is a proton gradient created?

The energy from the redox reactions (electron carriers being reduced and oxidised by electrons) is used to create the gradient so that the protons can flow through ATP synthase

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What makes oxidative phosphorylation an aerobic process?

Oxygen is the final electron acceptor so the electron transport chain cannot work without oxygen, so the complete break down of glucose is an aerobic process as the final step requires oxygen

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The hydrogen atoms released from the NAD and FAD could directly combine with the oxygen and release energy, why is this energy step not used

It is en exothermic reaction to bind the hydrogen to the oxygen, so to use that energy would heat up the cell too much

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Briefly sum up oxidative phosphorylation

The process which couples the flow of protons down the electrochemical gradient through ATP synthase, to synthesis ATP through combining ADP and Pi

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Other cards in this set

Card 2

Front

Describe what happens with the hydrogen atoms at the membrane

Back

Card 3

Front

How is a proton gradient created?

Back

Card 4

Front

What makes oxidative phosphorylation an aerobic process?

Back

Card 5

Front

The hydrogen atoms released from the NAD and FAD could directly combine with the oxygen and release energy, why is this energy step not used

Back

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Respiration- Oxidative Phosphorylation