How does protein structure influence muscle contraction?
This is from the part (b) of the first free-response question of AP Biology 2008.
By studying the protein structure review and the musculoskeletal system review of Biology Questions and Answers one can easily answer the question.
Remember actin and myosin interacting inside the sarcomere and how protein structure is fundamental for interaction between proteins.
Note how answering questions is easy if you know all the basic information about the subjects.
A tip: When facing a question, try first to guess the general subject the question is about.