Physiology The titin protein present in the muscle fibre binds A The tail ends of actin filaments to Z disc B The tail ends of myosin filaments to the Z disc C The tail end of myosin filaments to M disc D The myofibrils to each other, and also to the cell membrane 💡 Explanation The titin protein present in the muscle fibre binds ✓ Correct Answer: B. The tail ends of myosin filaments to the Z disc