The increasing order of pKa of following amino acids in aqueous solution is Gly, Asp, Lys, Arg
Biomolecules · Class 12 · JEE Main Previous Year Question
The increasing order of of following amino acids in aqueous solution is Gly, Asp, Lys, Arg
- a
Asp Gly Arg Lys
- b
Gly Asp Arg Lys
- c✓
Asp Gly Lys Arg
- d
Arg Lys Gly Asp
Asp Gly Lys Arg
Step 1: Classifying Residues — Amino acids are categorized by their nature: Acidic (Asp), Basic (Lys, Arg), and Neutral (Gly).
Step 2: Ranking Acidity/Basicity — The values increase with basicity. Acidic Asp has the lowest value, neutral Gly is intermediate, and basic Lys and Arg have high values.
Step 3: Comparing Basics — Arginine is more basic than Lysine due to its guanidino group. Therefore, the order of increasing is: Asp Gly Lys Arg. Correct option is (c).
Key Point: The (isoelectric point) follows a similar trend based on these structural properties.
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?