Question

In food processing, the primary purpose of blanching vegetables before freezing is to:

• A. Enhance flavor
• B. Reduce microbial load
• C. Inactivate enzymes
• D. Increase moisture content

Hint:

Blanching is essential to halt enzymatic actions that degrade quality during storage.

Answer 1

The Correct Option is C

Blanching involves briefly boiling or steaming vegetables to inactivate enzymes that can cause spoilage during storage. This process helps in preserving color, texture, and nutritional value during freezing and storage.

Answer 2

Purpose-First: Ask WHY vegetables spoil in the freezer even when frozen — the answer is enzymes still working slowly at low temperatures.

Blanching briefly heats vegetables just enough to inactivate these spoilage enzymes before freezing, which is exactly why it's a standard pre-freezing step.

Flavor enhancement, microbial load reduction, and moisture increase can happen incidentally, but none is blanching's PRIMARY purpose — enzyme inactivation is.