Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: All enzymes have an optimal temperature and ph.

A: All enzymes have an optimal temperature and what?
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Q: Ovulation takes place in the ovary and is part of the menstrual cycle.

A: Ovulation takes place in what organ and is part of the menstrual cycle?
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Q: Carbohydrates are the most common type of organic compound.

A:
What is the most common type of organic compound?
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