Q:

Which of the following muscle cell structures is the longest

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Which of the following muscle cell structures is the longest?


  1. A myofi lament
  2. A myofi bril
  3. A sarcomere
  4. A troponin molecule

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B: A muscle cell is a bundle of myofi brils. Myofi brils contain many

sarcomeres joined end to end. Within sarcomeres are found (the shorter) thick

and thin myofi laments.

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