How many carbon atoms are required to form a furan ring (ribofuranose)_____________?
Correct answer: B. 4
- A. 3
- B. 4
- C. 5
- D. 2Health
Explanation
A furanose ring is a five-membered ring containing four carbon atoms and one oxygen atom, so ribofuranose has 4 ring carbons. The likely mistake is choosing 5 by counting all ring atoms and forgetting that one of them is oxygen.
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