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

Ex Input:
The high points in a transverse wave are called crests.

Ex Output:
What are the high points in a transverse wave called?


Ex Input:
A volcano chain is formed by subduction of oceanic crust beneath a continental or oceanic plate.

Ex Output:
What kind of chain is formed by subduction of oceanic crust beneath a continental or oceanic plate?


Ex Input:
A(n) operon consists of one or more genes that encode the proteins needed for a specific function.

Ex Output:

Which region of dna consists of one or more genes that encode the proteins needed for a specific function?