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

Ex Input:
Atp or adenozine triphosphate is used for most energy functions in organisms.

Ex Output:
What molecule is used for most energy functions in organisms?

Ex Input:
Oxygen gas is given off by plants.

Ex Output:
Which gas is given off by plants?

Ex Input:
Mechanical to sound energy transformation occurs when a person hits a drum with a drumstick.

Ex Output:
Which energy transformation occurs when a person hits a drum with a drumstick?