Bchintermediate
Humans can synthesize ascorbate from L-gulonolactone using the enzyme described in the uronic acid pathway.
Answer
false
Explanation
### Why this is right
Humans lack the enzyme required for the final conversion toward ascorbate from L-gulonolactone. The material notes that some other animals can synthesize the vitamin, but humans and other primates cannot.
### The concept
The uronic acid pathway connects glucose metabolism to glucuronate and pentose-related products. Its possible contribution to ascorbate synthesis depends on the presence of the final enzyme, which is absent in humans.
### Terms
- **Ascorbate**: The ionized form of vitamin C.
- **L-gulonolactone**: An intermediate in the ascorbate-producing route in species that possess the required enzyme.
### Remember
Do not infer that humans make vitamin C from an animal pathway described in the material.
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