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Edexcel IAL Biology 7.4 Oxidative phosphorylation

Start with reduced coenzyme oxidation, trace electrons and proton movement across the membrane, then connect the gradient and ATP synthase to ATP and water formation.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
A2

Exam points

  • Identify cristae and the inner mitochondrial membrane as the electron-transfer site.
  • Trace electrons and proton pumping from reduced NAD through the transport chain.
  • Explain ATP synthase action and oxygen as the final electron acceptor forming water.

7.4—Oxidative phosphorylation question 1

[Maximum number: 1]

Animals use aerobic and anaerobic respiration to produce ATP.

Aerobic respiration has three stages where reactions occur between enzymes and substrates.

Hydramethylnon is an insecticide that is used to treat termite infestations.

Hydramethylnon inhibits the electron transport chain.
Which row of the table shows the expected changes caused by hydramethylnon?

Table for Question 7.4—Oxidative phosphorylation question 1 — Edexcel A-Level Biology A2
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