ATP Synthesis and Fatty Acid Oxidation problems
- 1. The oxidation of methanol (wood alcohol) in human retina tissue leads directly to the formation of
Options- A. formaldehyde
- B. sugars
- C. CO2
- D. none of these Discuss
Correct Answer: formaldehyde
- 2. The oxidation of methanol (wood alcohol) in human retina tissue indirectly leads to
Options- A. pressure builds up
- B. colour blindness
- C. blindness
- D. all of these Discuss
Correct Answer: blindness
- 3. The transport of acyl-CoA for oxidation using a shuttle involves formation of the intermediate
Options- A. 3 acetyl-CoA
- B. Acyl-coenzyme A
- C. acyl-carnitine
- D. None of these Discuss
Correct Answer: acyl-carnitine
- 4. Where the acyl-CoA formed in the cytosol is transported for oxidation?
Options- A. Mitochondrial matrix
- B. Microsomes
- C. Endoplasmic reticulum
- D. Remains in cytosol Discuss
Correct Answer: Mitochondrial matrix
- 5. The maximum energy per gram on oxidization is yielded from
Options- A. fat
- B. protein
- C. glycogen
- D. starch Discuss
Correct Answer: fat
- 6. 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
Correct Answer: 1 FADH2, 1 NADH and 1 acetyl-CoA
- 7. 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
Correct Answer: carboxyl end
- 8. 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
Correct Answer: are both required to make ATP
- 9. 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
Correct Answer: different affinities for ATP and for ADP
- 10. 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
Correct Answer: 8
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