Question

Which sugar is present in DNA?

• A. Ribose
• B. Arabinose
• C. Deoxyribose
• D. Glucose

Hint:

DNA contains deoxyribose; RNA contains ribose — remember the 'deoxy' refers to missing one oxygen atom.

Answer 1

The Correct Option is C

Step 1: Ribose is RNA's sugar, not DNA's, rule out.
Step 2: Arabinose and glucose are not nucleic-acid backbone sugars, rule out.
Step 3: DNA's sugar lacks a 2'-OH group compared to ribose, giving it its name.
Step 4: Correct answer, deoxyribose.