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MDCAT Practice Test - Practice Test - Biology - Support and Movement - 2026 Quiz

Attempt 10 MCQs on MDCAT Practice Test - Practice Test - Biology - Support and Movement (Year 2026) | Quiz 4

31. What is the repeating unit of a myofibril called?



32. Which protein makes up thick filaments?



33. Which band contains both thick and thin filaments?



34. What structure marks the ends of a sarcomere?



35. What line runs through the center of the A band?



36. Which zone shortens during muscle contraction?



37. Which protein complex binds calcium to initiate contraction?



38. Which protein covers the myosin-binding sites on actin in a resting muscle?



39. What is the contractile organelle within a muscle fiber?



40. What is the cell membrane of a muscle fiber called?



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