Which one of the following is the formula structure of D (α) glucose?
Correct answer: A. Option A
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
This structure shows a six-membered ring (pyranose form) with the OH group on the anomeric carbon (carbon-1) pointing down relative to the CH₂OH group on carbon-5. In D-glucose, this "down" position indicates the α-anomer. The rest of the OH groups follow the correct D-glucose configuration (C-2 OH down, C-3 OH up, C-4 OH down when drawn in Haworth projection). This matches the definition of D(α)-glucose.
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