Which of the following muscle cell structures is the longest? A. A myofi lament B. A myofi bril C. A sarcomere D. A troponin molecule
Option B. Myofibril muscle cell is the longest one. A muscle cell is a package of myofi brils. Myofi brils include many sarcomeres joined end to end. Within sarcomeres are found (the shorter) myosine and Actin myofi laments.
