Question

In a myofibril, the peripheral part of 'A' band is

• A. With actin filaments only
• B. With myosin filaments only
• C. Both actin and myosin filaments
• D. Without filaments

Answer 1

The correct option is C Both actin and myosin filaments

• Myofibrils are the contractile units within the cell that consists of a regular array of protein, called myofilaments.
  
• It contains thick bands and thin bands.
  
• The arrangement of the thick myosin filaments across the myofibrils and the cell causes them to refract light and produce a dark band known as the A Band.
  
• This Anisotropic band contains both thick and thin filaments.