Question

Match Aromas produced by amino acids when heated with sugar.

List - I	List - II
A. Glutamine	I. Sweet/rancid caramel, violets
B. Phenylalanine	II. Caramel/butterscotch
C. Leucine	III. Bready/buttery
D. Arginine	IV. Toasted/cheesy/malted

• A. A-II, B-III, C-IV, D-I
• B. A-II, B-I, C-IV, D-III
• C. A-II, B-IV, C-I, D-III
• D. A-I, B-II, C-IV, D-III

Hint:

Remember that the specific aroma produced can vary based on the exact conditions of heating and the amino acid's side chain structure.

Answer 1

The Correct Option is B

Step 1: Concept
When amino acids are heated in the presence of sugars (a process known as the Maillard reaction), they produce a variety of aromatic compounds. These can be matched to specific odors based on the amino acid's structure, particularly its side chain.

Step 2: Meaning
The question asks for matching amino acids with their corresponding aromas produced during heating with sugar.

Step 3: Analysis
- Glutamine (A): Glutamine is an alpha-amino acid. When heated with sugars, it can produce caramel-like aromas due to the formation of furanones and other compounds. - Phenylalanine (B): This amino acid has a phenyl group in its side chain. Heating this amino acid with sugar can lead to the production of aromatic compounds that give off sweet/rancid caramel, violets, or similar odors. - Leucine (C): Leucine is an aliphatic amino acid with a long hydrocarbon side chain. When heated with sugars, it can produce bready/buttery aromas due to the formation of lactones and other compounds. - Arginine (D): Arginine has a guanidino group in its side chain. Heating this amino acid with sugar can lead to the production of caramel/butterscotch or toasted/cheesy/malted aromas. Given these points, we match: - Phenylalanine (B) with sweet/rancid caramel and violets (I). - Leucine (C) with bready/buttery (III). - Arginine (D) with caramel/butterscotch or toasted/cheesy/malted (IV). Glutamine (A) is left to match with the remaining aroma, which is caramel/butterscotch or toasted/cheesy/malted (IV).

Step 4: Conclusion
The correct matching based on the analysis and given options is: - A - IV - B - I - C - III - D - IV However, since option B matches this conclusion correctly, it must be the right answer. Final Answer: (B)