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Expression of IdeasMediumExplaining a cause

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - Bread goes stale mainly because its starch recrystallises, not because it dries out. - Recrystallisation happens fastest at refrigerator temperatures. - At room temperature it is slower; when frozen it almost stops. - Reheating bread briefly reverses some of the staling.

The student wants to explain why refrigerating bread is a poor way to keep it fresh. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. Bread goes stale mainly because its starch recrystallises, and that process runs fastest at refrigerator temperatures, so a fridge makes bread stale sooner than a cupboard would.Correct
  2. B. Bread goes stale over time.
  3. C. Freezing bread almost stops staling.
  4. D. Reheating bread reverses some staling.

Answer: A. Bread goes stale mainly because its starch recrystallises, and that process runs fastest at refrigerator temperatures, so a fridge makes bread stale sooner than a cupboard would.

The mechanism and why the fridge speeds it.

Why the other answers are wrong

B. Bread goes stale over time.
No reason given.
C. Freezing bread almost stops staling.
About freezing, not refrigerating.
D. Reheating bread reverses some staling.
About reversing, not preventing.

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