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Question 1

Which of the following statements about the reactions of glycolysis is correct?

a) In glycolysis glucose-6-phosphate is split into glyceraldehyde-3-phosphate and dihydroxyacetone phosphate.

b) In glycolysis fructose-1:6-bisphosphate is split into glyceraldehyde-3-phosphate and dihydroxyacetone phosphate.

c) In glycolysis fructose-6-phosphate is split into glyceraldehyde-3-phosphate and dihydroxyacetone phosphate.

d) In glycolysis glucose-6-phosphate is isomerized to fructose-1:6-bisphosphate.

Question 2

Which of the following statements about the glycolytic intermediate, fructose-6-phosphate is correct?

a) In glycolysis fructose-6-phosphate is formed from glucose-6-phosphate and is split by the aldol reaction into an aldehyde and a ketone.

b) In glycolysis fructose-6-phosphate is an aldol so once phosphorylated to fructose-1:6-bisphosphate cannot be split by the aldol reaction into an aldehyde and a ketone.

c) In glycolysis fructose-6-phosphate is converted to glucose-6-phosphate and can then be split by the aldol reaction into an aldehyde and a ketone.

d) In glycolysis fructose-6-phosphate is an aldol but is not itself split by the aldol reaction until phosphorylated to fructose-1:6-bisphosphate.

Question 3

Which of the following statements about the citric acid cycle is correct?

a) Oxygen is used to oxidise the acetyl group carbons of acetyl-CoA in the citric acid cycle.

b) Three molecules of NADH and one molecule of FADH₂ are produced in one turn of the citric acid cycle.

c) Oxygen is not used in the citric acid cycle, so the cycle can occur in anaerobic conditions.

d) The citric acid cycle produces the water that is formed during the complete oxidation of glucose.

Question 4

Which of the following statements about the electron transport chain is correct?

a) The electron transport chain is made up of a chain of electron carriers with decreasing electron affinity.

b) The electron transport chain is made up of a chain of electron carriers with increasing redox potential.

c) The electron transport chain is made up of a chain of electron carriers with decreasing oxidising power.

d) The electrons transferred from carrier to carrier in the electron transport chain gain energy.

Question 5

Which of the following statements about the generation of ATP in the electron transport chains is correct?

a) The F₁subunit of the ATP synthase contains the motor which is driven to rotate by the proton flow.

b) The F₁subunit of the ATP synthase contains the catalytic centre that synthesizes ATP.

c) The F₀subunit of the ATP synthase binds ADP and Pi tightly before ATP synthesis occurs.

d) The F₀subunit of the ATP synthase contains the catalytic centre that synthesizes ATP.

Oxford University Press, Online Resource Centre, Chapter 12.

Chapter 12

Instructions

Question 1

Question 2

Question 3

Question 4

Question 5