Question

Sugar present in DNA is:

• A. β-D-2-ribose
• B. β-D-2-deoxyribose
• C. α-D-2-ribose
• D. α-D-2-deoxyribose

Hint:

DNA sugar: β-D-2-deoxyribose; RNA sugar: β-D-ribose.

Answer 1

The Correct Option is B

Step 1: Distinguish DNA sugar from RNA sugar.
RNA contains ribose (pentose with -OH at C-2). DNA is the deoxygenated form -- the -OH at C-2 is replaced by -H.

Step 2: Specify the exact form.
The sugar in DNA is \(\beta\)-D-2-deoxyribose.
\[ \boxed{\beta\text{-D-2-deoxyribose}} \]