Practice Exam Questions

Question 1

1. In the reaction C6H12O6 + 6O2 —> 6 CO2 + 6H2O,
2. Oxygen Becomes Reduced
3. Glucose becomes reduced
4. Oxygen becomes oxidized
5. Carbon Becomes Oxidized

Answer 1

1

Question 2

2. For each starting molecule of glucose, what is the number of ATP molecules created directly from pyruvate?
3. 0
4. 1
5. 2
6. 3
7. 4

Answer 2

1

Question 3

3. A substrate that has been phosphorylated
4. Has a stable phosphate bond
5. has been formed by reaction ADP + P -> ATP
6. Has gained electrons from a redox reaction
7. will pass its electrons to the electron transport chain

Answer 3

1

Question 4

4. List the order of the following compunds as they occur in cellular respiration.
5. pyruvate
6. citric acid
7. glucose
8. acetyl CoA
9. H2O

Answer 4

3,1,4,2,5

Question 5

5. Fats and proteins can be used as fuel in the cell because they
6. can be converted to glucose by enzymes
7. can be converted to intermediates to glycolysis or the Krebs Cycle
8. Can pass through the mitochondria membrane to enter the Krebs Cycle
9. Contain unstable phosphate bonds
10. Both A and B

Answer 5

2

Question 6

6. The major reason that glycolysis is not as energy productive as cellular respiration is that
7. it is the pathway common to fermentation and respiration
8. it requires and input of energy to start the reactions
9. NAD+ is regernerated by alcohol or lactic acid production without the highenergy electrons passing theough the electron transport chain
10. puruvate still retains much of the energy from glucose

Answer 6

4

Question 7

7. True or False. The link between electron transport and ATP sythase is the transfer of electrons to ATP synthase to produce energy.

Answer 7

False. electrons never go on the ATP synthase

Question 8

8. In the chemiosmotic mechanism in a mitochondria
9. the diffence in pH between the intermembranse space and the cytosol drives the formation of ATP
10. the production of water in the matrix by the reduction of oxygen leads to a net flow of water out of a mitochondrion
11. the energy released by the reduction and subsequent oxidation of components of the electron transport chain is transferred as phosphate to ADP
12. The production of ATP is linked to the proton gradient established by the electron transport chain

Answer 8

4