IB Biology HL C1.2 Cell respiration questions

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Question 1

Paper 2Easy6 marks

During aerobic respiration, electrons pass along the electron transport chain in the inner mitochondrial membrane. Answer the following questions about the proton gradient and ATP synthesis.

(a)

State how energy released as electrons pass along the electron transport chain is used, and state the direction in which protons are moved across the inner mitochondrial membrane.

[2]
(b)

State the difference in proton concentration across the inner mitochondrial membrane that results.

[1]
(c)

State the direction in which protons move through ATP synthase.

[1]
(d)

Explain how the movement of protons through ATP synthase results in ATP synthesis.

[2]

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