If deoxyribose sugar is supplemented with oxygen at the second carbon atom, which one of these is formed?
Correct answer: D. Ribose
- A. Erythrose
- B. Ribulose
- C. Heptose
- D. Ribose
Explanation
The correct answer is Ribose. Deoxyribose is similar to ribose but lacks an oxygen atom at the second carbon. When this deficiency is corrected by adding an oxygen atom to the second carbon, deoxyribose becomes ribose. The other options are incorrect: Erythrose is a tetrose with only 4 carbon atoms, Ribulose is a ketopentose rather than an aldopentose, and Heptose has 7 carbon atoms, which doesn't match the structural framework of deoxyribose or ribose.
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