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

Example Input: Matter that mechanical wave energy can only travel through is medium.
Example Output: What is the name of matter that mechanical wave energy can only travel through?

Example Input: Rod is the general shape of centrioles.
Example Output: What is the general shape of centrioles?

Example Input: Both glyceraldehyde and glyceric acid are derivatives of biochemical intermediates in metabolism of sugar.
Example Output:
Both glyceraldehyde and glyceric acid are derivatives of biochemical intermediates in metabolism of what?