Electron Tranfer Chain Questions
1.	Which of the following produce ATP in mitochondria?
A.	The movement of protons from the matrix to the intermembrane space
B.	The movement of protons from the intermembrane space to the cytoplasm
C.	The splitting of water molecules and the movement of electrons to oxygen
D.	The movement of protons from the intermembrane space to the matrix
(1)
2.	During which process are oxygen molecules directly involved during cellular respiration?
A.	Glycolysis
B.	Krebs cycle
C.	Oxidation of pyruvate to acetyl CoA
D.	Accepting electrons at the end of the electron transport chain
(Total 1 mark)
3.	Which way do the protons flow when ATP is synthesized in mitochondria?
A.	From the inner matrix to the intermembrane space
B.	From the intermembrane space to the inner matrix
C.	From the intermembrane space to the cytoplasm
D.	From the cytoplasm to the intermembrane space
(Total 1 mark)
4.	What accumulates in the inter-membrane space of the mitochondrion during electron transport?
A.	ATP
B.	Electrons
C.	Protons (hydrogen ions)
D.	Oxygen
(Total 1 mark)

5.	The electron micrographs below show mitochondria in longitudinal section. The mitochondrion in A is from a bat pancreas cell and that in B is from a mouse liver cell.

[Source: Tribe and Whittaker, Chloroplasts and Mitochondria, (1972), 31, pp 28–29]
 (a)	Annotate the micrographs to show two similarities in the structure of the mitochondria.
(2)
(b)	The mitochondria differ in size. State two other differences that are visible in the mitochondria.
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2.	..........................................................................................................................
(2)
 
(c)	Predict, with two reasons, which of the mitochondria would have been able to produce ATP at a greater rate.
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(3)
(Total 7 marks)

 
6.	The diagram below shows some features of ATP synthetase.
(a)	Identify in which cell organelle the process below occurs?
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(1)
(b)	Explain the process represented by the diagram.
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(3)
(Total 4 marks)