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

Ex Input:
Cells have four cycles.

Ex Output:
How many cycles do cells have?


Ex Input:
Molar masses can be used to determine the mass of a quantity of material.

Ex Output:
What can be used to determine the mass of a quantity of material?


Ex Input:
Active transport mechanisms require the use of the cell’s energy, usually in the form of adenosine triphosphate (atp.

Ex Output:

Active transport mechanisms require the use of the cell’s energy, usually in the form of what?