Podcast
Questions and Answers
Which enzyme is responsible for the oxidation of acyl CoA during beta-oxidation?
Which enzyme is responsible for the oxidation of acyl CoA during beta-oxidation?
- Enoyl CoA hydratase
- Acyl CoA dehydrogenase (correct)
- β-Hydroxyacyl CoA dehydrogenase
- β-ketoacyl CoA thiolase
What is the product formed after the hydration step in beta-oxidation?
What is the product formed after the hydration step in beta-oxidation?
- β-ketoacyl CoA
- NADH
- Acetyl CoA
- β-Hydroxyacyl CoA (correct)
Which step in beta-oxidation generates NADH?
Which step in beta-oxidation generates NADH?
- Oxidation
- Hydration
- Cleavage (correct)
- None of the above
What is the final reaction in beta-oxidation?
What is the final reaction in beta-oxidation?
How many cycles of beta-oxidation are required to yield 8 acetyl CoA from palmitoyl CoA?
How many cycles of beta-oxidation are required to yield 8 acetyl CoA from palmitoyl CoA?
Which molecule is responsible for the isomerization of all-trans retinal to 11-cis retinal in the visual cycle?
Which molecule is responsible for the isomerization of all-trans retinal to 11-cis retinal in the visual cycle?
What is the primary event in the visual cycle when exposed to light?
What is the primary event in the visual cycle when exposed to light?
Where does the conversion of all-trans retinol to all-trans retinal occur?
Where does the conversion of all-trans retinol to all-trans retinal occur?
What is the molecule that combines with opsin to regenerate rhodopsin in the visual cycle?
What is the molecule that combines with opsin to regenerate rhodopsin in the visual cycle?
What happens to most of the all-trans-retinol in the visual cycle?
What happens to most of the all-trans-retinol in the visual cycle?
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Study Notes
Beta-Oxidation
- The enzyme responsible for the oxidation of acyl CoA during beta-oxidation is not specified (need more information).
- The product formed after the hydration step in beta-oxidation is not specified (need more information).
- The step in beta-oxidation that generates NADH is not specified (need more information).
- The final reaction in beta-oxidation is not specified (need more information).
- It takes 7 cycles of beta-oxidation to yield 8 acetyl CoA from palmitoyl CoA.
Visual Cycle
- The molecule responsible for the isomerization of all-trans retinal to 11-cis retinal in the visual cycle is not specified (need more information).
- The primary event in the visual cycle when exposed to light is the isomerization of 11-cis retinal to all-trans retinal.
- The conversion of all-trans retinol to all-trans retinal occurs in the retina.
- The molecule that combines with opsin to regenerate rhodopsin in the visual cycle is 11-cis retinal.
- Most of the all-trans-retinol in the visual cycle is either reduced back to retinol or transported to the RPE for re-isomerization and recycling.
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