Why Must Tropomyosin Cover the Thin Filament in Just the Right

question 5

Multiple Choice

Why must tropomyosin cover the thin filament in just the right position before the muscle can relax?

• A)It covers the myosin binding sites and, if left exposed, will allow the myosin to bind and pull.
• B)Without it in the correct position, calcium cannot be released.
• C)It is needed in the proper location or ATP cannot be used.
• D)It has a particular binding place that facilitates the removal of calcium.

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