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Home ‣ Biochemistry ‣ ATP Synthesis and Fatty Acid Oxidation Comments
- Question
The irreversibility of the thiokinase reactions (formation of initial acyl-CoA)
Options- A. make this activation reaction the committed step on the pathway
- B. is due to the subsequent hydrolysis of the product
- C. applies only to even-chain fatty acids
- D. both (a) and (b)
- Correct Answer
- both (a) and (b)
- 1. How many molecules of acetyl-CoA are produced in oxidation of palmitic acid (C16), which involves seven rounds of oxidation?
Options- A. 6
- B. 7
- C. 8
- D. 9 Discuss
- 2. The three identical b subunits of the F1, complex during ATP synthesis have
Options- A. different affinities for ATP but not for ADP
- B. different affinities for ADP but not for ATP
- C. different affinities for ATP and for ADP
- D. similar affinities for ADP and ATP Discuss
- 3. Membrane potential and the proton gradient
Options- A. are both required to make ATP
- B. are sufficient, separately, to make ATP from ADP + Pi;
- C. reinforce one another when respiratory inhibitors are present
- D. cancel one another when uncouplers are present Discuss
- 4. Long-chain fatty acids are oxidized step-wise in one carbon units starting from the
Options- A. carboxyl end
- B. aliphatic end
- C. both (a) and (b)
- D. none of these Discuss
- 5. Each cycle of ?-oxidation produces
Options- A. 1 FADH2, 1 NAD+, and 1 acetyl-CoA
- B. 1 FADH2, 1 NADH and 1 acetyl-CoA
- C. 1 FADH2, 1 NADH and 2 CO2 molecules
- D. 1 FAD, 1 NAD+ and 2 CO2 molecules Discuss
- 6. 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
- 7. In aerobic respiration, the compound that enters a mitochondrion is
Options- A. acetyl CoA
- B. pyruvate
- C. phosphoglyceraldehyde
- D. oxaloacetate Discuss
- 8. How many CO2 molecules are exhaled for each O2 molecule utilized in cellular respiration?
Options- A. 1
- B. 3
- C. 6
- D. 12 Discuss
- 9. 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
- 10. 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
ATP Synthesis and Fatty Acid Oxidation problems
Search Results
Correct Answer: 8
Correct Answer: different affinities for ATP and for ADP
Correct Answer: are both required to make ATP
Correct Answer: carboxyl end
Correct Answer: 1 FADH2, 1 NADH and 1 acetyl-CoA
Correct Answer: Direct transfer of phosphate from a substrate molecule to ADP
Correct Answer: pyruvate
Correct Answer: 1
Correct Answer: a lipid-soluble electron carrier
Correct Answer: all of these
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