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

Example Input: Protons and neutrons are made of quarks, which are fundamental particles of matter.
Example Output: A fundamental particle of matter, protons and neutrons are made of these?

Example Input: Moving air masses is the main reason for weather change.
Example Output: What is the main reason for weather change?

Example Input: Difference in charges causes a voltage to exist across the membrane in cells.
Example Output:
What causes a voltage to exist across the membrane in cells?