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

Q: The refrigerator door contains iron of the following statements best explains why magnets usually stick to a refrigerator door.

A: Which of the following statements best explains why magnets usually stick to a refrigerator door?
****
Q: The sound in a loud classroom is an example of a form of energy.

A: Which of the following is an example of a form of energy?
****
Q: The goal of proteomics is to identify or compare proteins expressed from a given genome under specific conditions, study the interactions between them, and use the information to predict cell behavior or develop drug targets.

A:
The goal of proteomics is to identify or compare what substances expressed from a given genome under specific conditions, study the interactions between them, and use the information to predict cell behavior or develop drug targets?
****