Bchintermediate
Select ALL correct functions or products of the pentose phosphate pathway.
Answer
Production of reduced nicotinamide adenine dinucleotide phosphate (NADPH), Production of ribose-5-phosphate for nucleotide synthesis, Transfer of carbon units between sugar phosphates through transketolase and transaldolase
Explanation
### Why this is right
- The oxidative phase generates NADPH.
- Ribose-5-phosphate supplies the sugar component of nucleotides.
- Transketolase and transaldolase rearrange carbon units among sugar phosphates.
### The concept
The pathway branches from glucose-6-phosphate and can supply either reducing power or pentose sugars. Its nonoxidative reactions also rearrange sugars into intermediates that can return to central carbohydrate metabolism.
### The other options
- **Direct production of lactate as its defining product**: Lactate is associated with anaerobic glycolysis, not the defining output of this pathway.
### Terms
- **Transketolase**: Transfers a two-carbon unit between sugar phosphates.
- **Transaldolase**: Transfers a three-carbon dihydroxyacetone unit.
- **NADPH**: Reduced nicotinamide adenine dinucleotide phosphate.
### Remember
Think NADPH and ribose when identifying the pentose phosphate pathway.
Related Questions
- Which enzyme deficiency can cause hemolysis after exposure to certain drugs because red blood cells cannot generate adequate reducing power?(advanced)
- Under anaerobic conditions, lactate dehydrogenase uses reduced nicotinamide adenine dinucleotide (NADH) to reduce pyruvate and regenerate nicotinamide adenine dinucleotide (NAD+).(basic)
- Where do the enzymes of glycolysis operate, and what is its principal end product under anaerobic conditions?(basic)
- Which enzyme cleaves fructose-1-phosphate into glyceraldehyde and dihydroxyacetone phosphate?(basic)
- Select ALL correct enzyme-product pairs in dietary carbohydrate digestion.(basic)
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