NBME 15 Myosin bonding sites on actin remain covered by troponin C (NBME Answers)

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Retired NBME 15 Answers

nbme15/Block 3/Question#7 (reveal difficulty score)
During an experiment of muscle contraction, ...
Myosin bonding sites on actin remain covered by troponin C 🔍 / 📺 / 🌳 / 📖
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submitted by ∗epiglotitties(29)

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Tropomyiosin is blocking myosin-bingind sites on the actin filament. Released Ca2+ binds to troponin C , shifting the tropomyosin to expose the myosin-binding sites. FA 2018 pg.446

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lucifer546 This question does confuse you a bit as it is not troponin C itself that covers the myosin binding site but you can rule out the rest +1

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