Question

The lysine plus sucrose generate/produce ........... type of meat flavour

• A. Beef broth like aroma
• B. Chicken like aroma
• C. Boiled meat like aroma
• D. Baked ham like aroma

Hint:

In Maillard model systems:
- Lysine + Sucrose/Glucose \(\rightarrow\) Baked ham aroma.
- Cysteine + Ribose \(\rightarrow\) Beef-like aroma.
- Methionine + Glucose \(\rightarrow\) Potato-like aroma.
- Proline + Glucose \(\rightarrow\) Bakery/Bread aroma.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
The Maillard reaction is a complex network of non-enzymatic browning reactions between reducing sugars and amino acids, typically initiated by heat.
In food science, model Maillard reaction systems are studied to determine how specific combitions of amino acids and sugars generate distinct savory and roasted aroma profiles.

Step 2: Detailed Explation:
Lysine is a basic amino acid with a highly reactive termil \(\varepsilon\)-amino group.
During thermal processing, sucrose (which easily hydrolyzes into its reducing monomers, glucose and fructose) reacts with the amino groups of lysine.
Because lysine has two reactive amino groups, it undergoes extensive Maillard reactions, producing a distinct volatile profile.
In model flavoring research, the reaction of lysine with sucrose or glucose generates key heterocyclic compounds, including specific pyrazines, pyridines, and alkylpyrroles.
This chemical mixture produces a characteristic cured, sweet, and roasted meat aroma, which is described as a baked ham-like aroma.
To compare:
• Cysteine reacted with reducing sugars produces sulfur-containing volatiles (thiophenes, thiazoles) that generate beef broth-like or chicken-like aromas.

• Proline generates bread-like or cracker-like aromas.
Thus, the combition of lysine and sucrose is associated with a baked ham-like aroma profile.

Step 3: Fil Answer:
The correct option is (D).