Sugar moiety in DNA and RNA molecules respectively are
Biomolecules · Class 12 · JEE Main Previous Year Question
Sugar moiety in DNA and RNA molecules respectively are
- a
-D-2-deoxyribose, -D-deoxyribose
- b✓
-D-2-deoxyribose, -D-ribose
- c
-D-ribose, -D-2-deoxyribose
- d
-D-deoxyribose, -D-2-deoxyribose
-D-2-deoxyribose, -D-ribose
Step 1: DNA Sugar — The sugar in DNA is -deoxy-D-ribose, which lacks an oxygen at the position.
Step 2: RNA Sugar — The sugar in RNA is D-ribose, which contains hydroxyl groups at both and positions.
Step 3: Result Selection — Therefore, the sequence is -D-2-deoxyribose for DNA and -D-ribose for RNA. Correct option is (b).
Key Point: The "deoxy" nature of DNA sugar contributes to its higher chemical stability compared to RNA.
Practice this question with progress tracking
Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Biomolecules) inside The Crucible, our adaptive practice platform.
More JEE Main Biomolecules PYQs
Which of the following is the correct structure of L-fructose?
Identify the number of structure/s from the following which can be correlated to D-glyceraldehyde.
Identify correct conversion during acidic hydrolysis from the following: (A) starch gives galactose. (B) cane sugar gives equal amount of glucose and fructose. (C) milk sugar gives glucose and…
Fat soluble vitamins are: A. Vitamin B1 B. Vitamin C C. Vitamin E D. Vitamin B12 E. Vitamin K Choose the correct answer from the options given below:
Which of the following acids is a vitamin?