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

Example Input: The second step in eukaryotic cell division is division of nucleus part of the cell.
Example Output: The second step in eukaryotic cell division is division of which part of the cell?

Example Input: Insulin is made up of two polypeptide chains.
Example Output: Insulin is made up of how many polypeptide chains?

Example Input: Proteins are long chains of amino acids.
Example Output:
What are long chains of amino acids?