​When a Muscle Fiber Is Relaxed, Myosin Cannot Bind to Actin

question 49

Multiple Choice

​When a muscle fiber is relaxed, myosin cannot bind to actin because ____.

• A) ​ATP is not present
• B) ​the myosin binding site on actin is blocked
• C) ​the myosin head is in the wrong shape for binding
• D) ​the actin is in the wrong orientation for myosin binding
• E) ​the myosin head is 180 degrees from its attachment configuration

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Definitions:

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An amendment to the U.S. Constitution guaranteeing the rights of criminal defendants, including the right to a speedy and public trial, an impartial jury, and the assistance of counsel.

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