Oxidative Phosphorylation problems
- 1. Which of the following is not a feature of oxidative phosphorylation?
Options- A. Direct transfer of phosphate from a substrate molecule to ADP
- B. An electrochemical gradient across the inner mitochondrial membrane
- C. A membrane bound ATP synthase
- D. A protonmotive force Discuss
Correct Answer: Direct transfer of phosphate from a substrate molecule to ADP
- 2. In aerobic respiration, the compound that enters a mitochondrion is
Options- A. acetyl CoA
- B. pyruvate
- C. phosphoglyceraldehyde
- D. oxaloacetate Discuss
Correct Answer: pyruvate
- 3. How many CO2 molecules are exhaled for each O2 molecule utilized in cellular respiration?
Options- A. 1
- B. 3
- C. 6
- D. 12 Discuss
Correct Answer: 1
- 4. Coenzyme Q is involved in electron transport as
Options- A. directly to O2
- B. a water-soluble electron donor
- C. covalently attached cytochrome cofactor
- D. a lipid-soluble electron carrier Discuss
Correct Answer: a lipid-soluble electron carrier
- 5. A biological redox reaction always involves
Options- A. an oxidizing agent
- B. a gain of electrons
- C. a reducing agent
- D. all of these Discuss
Correct Answer: all of these
- 6. Lactic acid is produced by human muscles during strenuous exercise because of lack of
Options- A. oxygen
- B. NAD+
- C. glucose
- D. ADP and Pi Discuss
Correct Answer: oxygen
- 7. The aerobic breakdown of glucose known as respiration involves
Options- A. electron transport phosphorylation
- B. glycolysis
- C. Krebs Cycle
- D. all of the above Discuss
Correct Answer: all of the above
- 8. During glycolysis, electrons removed from glucose are passed to
Options- A. FAD
- B. NAD+
- C. acetyl CoA
- D. pyruvic acid Discuss
Correct Answer: NAD+
- 9. The carbon dioxide is primary a product of
Options- A. Krebs cycle
- B. glycolysis
- C. electron transport phosphorylation.
- D. lactate fermentation. Discuss
Correct Answer: Krebs cycle
- 10. The complete oxidation of glucose yields usable energy in the form of
Options- A. FADH2
- B. coenzyme A
- C. ATP
- D. pyruvic acid Discuss
Correct Answer: ATP
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