Practice question

MCQ

Question

Which of the following is an incorrect statement about the sliding filament theory?

Options

Choose one · Correct answer highlighted

Actin filaments slide over myosin filaments during contraction. Myosin heads form cross-bridges with actin filaments. ATP is not required for cross-bridge formation. Correct Calcium ions bind to troponin to expose binding sites on actin.

Explanation

ATP is required for cross-bridge formation and subsequent muscle contraction.

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