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Refer to the Diagram Below

question 46

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Refer to the diagram below. Which of the following statements is true? Refer to the diagram below. Which of the following statements is true?   A)  Structure 1 has ATPase activity. B)  Structure 2 blocks sites where myosin can bind. C)  Structure 3 has one subunit that binds myosin. D)  Structure 4 shortens in length as the sarcomere contracts. E)  Structure 5 binds calcium.


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