Which of These Puts the Steps of the Sliding Filament

question 21

Multiple Choice

Which of these puts the steps of the sliding filament model of muscle contraction in the correct order?

• A) ATP is hydrolyzed as myosin heads bind the actin filament→myosin heads bind ATP→ADP + P are released and the myosin heads pull the actin filament
• B) Myosin heads bind ATP→ATP is hydrolyzed as myosin heads bind the actin filament→ADP + P are released and the myosin heads pull the actin filament
• C) ADP + P are released and the myosin heads pull the actin filament→ATP is hydrolyzed as myosin heads bind the actin filament→myosin heads bind ATP
• D) Myosin heads bind ATP→ ADP + P are released and the myosin heads pull the actin filament→ATP is hydrolyzed as myosin heads bind the actin filament
• E) ATP is hydrolyzed as myosin heads bind the actin filament→ADP + P are released and the myosin heads pull the actin filament→myosin heads bind ATP

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