The pentose of DNA is:
Correct answer: D. Deoxyribose
- A. Ribose
- B. Ribulose
- C. Deoxyribulose
- D. Deoxyribose
Explanation
The correct answer is Deoxyribose. Deoxyribose is a five-carbon sugar and a key component of DNA, making it a deoxyribonucleotide. It lacks an oxygen atom on the 2' carbon compared to ribose, which is found in RNA. Ribose is not part of DNA, and ribulose plays a role in carbohydrate metabolism, not in nucleic acids. Deoxyribulose is not a real sugar and does not exist in this context.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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