Modified atmosphere packaging extends shelf life by _____[Fill in the blank]

Question

BlackTom AI · Accepted Answer

Exploring what modified atmosphere packaging (MAP) does requires examining how it influences food preservation.
Option a: Adding a preservative to the packaging. While preservatives can extend shelf life, MAP specifically works by altering the gaseous environment around the food, not by introducing chemical preservatives into the package. So this statement misstates the mechanism of MAP.
Option b: Decrease the water content of food. MAP does not remove water from the food itself. It changes the air or gas composition surrounding the product to slow spoilage, not by drying or dehumidifying the food. Therefore this option is incorrect.
Option c: Altering gas composition around the food. This is exactly the core idea of MAP: adjusting oxygen, carbon dioxide, nitrogen, and other gases to slow microbial growth and oxidative reactions, thereby extending shelf life.
Option d: Reducing enzymatic browning in food. While MAP can indirectly influence browning by modifying oxidation, the primary function is about gas composition to suppress spoilage organisms and oxidation in general, not specifically targeting enzymatic browning as the main mechanism. This makes the option incomplete or secondary to the primary mechanism described in MAP.
In summary, the correct concept is that modified atmosphere packaging extends shelf life by changing (altering) the gas composition surrounding the food, which inhibits spoilage processes. The other options describe different preservation strategies or outcomes that do not capture the defining mechanism of MAP.

Modified atmosphere packaging extends shelf life by _____[Fill in the blank]Single choice

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