instruction:
Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.
question:
Fact: Something studied by Michael Faraday can cause objects to repel each other. 
Question: What can cause objects to repel each other?
answer:
Something studied by Michael Faraday.


question:
Fact: DNA strands are called a polynucleotide. 
Question: What is a DNA strand?
answer:
Polynucleotide.


question:
Fact: Difficult chemistry is needed to carry out all the functions of life. 
Question: Difficult chemistry is needed to complete the processes of what?
answer:

life.