TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Combustion reaction occurs when a substance reacts quickly with oxygen.

SOLUTION: What occurs when a substance reacts quickly with oxygen?

PROBLEM: Glycolysis is a series of reactions that is common to fermentation and cellular respiration.

SOLUTION: What series of reactions is common to fermentation and cellular respiration?

PROBLEM: Downregulation helps cells reduce their reaction to excessive hormone levels.

SOLUTION:
What helps cells reduce their reaction to excessive hormone levels?