Question

Most prominent biochemical change influencing the Body and Texture of the cheese is

• A. Proteolysis
• B. Lipolysis
• C. Lactose fermentation
• D. Lipid oxidation

Hint:

To remember the primary roles of ripening pathways:
- Proteolysis \(\rightarrow\) Controls body, texture, and meltability (by breaking down the casein framework).
- Lipolysis \(\rightarrow\) Controls sharp, pungent flavors (by releasing free fatty acids).
- Glycolysis \(\rightarrow\) Controls acid development and preservation.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Cheese ripening is a complex biochemical process that transforms the elastic, rubbery green curd into a smooth, flavorful cheese.
This transformation is driven by three primary biochemical pathways: glycolysis (lactose fermentation), lipolysis (lipid breakdown), and proteolysis (protein breakdown).

Step 2: Detailed Explanation:
Each biochemical pathway influences different quality attributes of the cheese:
-Lactose Fermentation (Glycolysis):
Occurs primarily during the early stages of cheesemaking and pressing.
It converts lactose into lactic acid, lowering the pH and establishing the acidic environment necessary for preservation and enzyme activity.
-Lipolysis:
Hydrolyzes milk fats into free fatty acids, contributing primarily to the development of sharp, pungent flavors and aromas (especially in blue and hard cheeses).
-Proteolysis:
Proteolysis is the breakdown of the rigid, three-dimensional casein protein matrix into smaller peptides and amino acids.
As the intact caseins (especially \(\alpha_{s1}\)-casein) are cleaved by proteases, the structural framework of the cheese weakens.
This degradation directly softens the cheese, transforming its body from rubbery to smooth, creamy, or crumbly.
It also improves the melting properties of the cheese.
Therefore, proteolysis is the primary biochemical pathway that regulates the body, texture, and physical characteristics of ripened cheese.

Step 3: Final Answer:
The most prominent biochemical change influencing the body and texture of cheese is proteolysis, which corresponds to Option (A).