Given a scientific question, generate a correct answer to it.

[EX Q]: The lifecycle of an ascomycete is characterized by the production of what during the sexual phase?
[EX A]: asci

[EX Q]: Each cell and every living thing requires what?
[EX A]: energy

[EX Q]: Hemoglobin, with four polypeptide chains or subunits, is the most frequently cited example of a protein having what kind of structure?
[EX A]:
quaternary