Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: The behavior of ideal gases is explained by kinetic molecular theory.

Answer: The behavior of ideal gases is explained by what theory of gases?


Question: Collision frequency is greater for homogeneous category of catalysts, which also tend to be more sensitive to temperature and more 'expensive'.

Answer: Collision frequency is greater for what category of catalysts, which also tend to be more sensitive to temperature and more 'expensive'?


Question: During the synthesis phase, dna replication occurs in the cell cycle.

Answer:
What phase does dna replication occur in the cell cycle?