Which of the following is the smallest structure within a muscle fi bre? A. myosin B. myofi lament C. myofi bril D. sarcomere
Option A.Myosine has smallest structure within a muscle fibre. Myosin is a molecule that makes up a thick myofi lament. Many thick and thin myofi laments make up a sarcomere. Many sarcomeres joined end to end to shape a myofi bril.
