Foods Can Be Preserved in Many Ways by Slowing or Preventing

question 7

Multiple Choice

Foods can be preserved in many ways by slowing or preventing bacterial growth. Which of these methods would not generally inhibit bacterial growth?

• A)Refrigeration: Slows bacterial metabolism and growth.
• B)Closing previously opened containers: Prevents more bacteria from entering, and excludes O₂.
• C)Pickling: Creates a pH at which most bacterial enzymes cannot function.
• D)Canning in heavy sugar syrup: Creates osmotic conditions that remove water from most bacterial cells.
• E)Irradiation: Kills bacteria by mutating their DNA to such an extent that their DNA-repair enzymes are overwhelmed.

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