Question

Choose the correct statement about muscles.

• A. There are 2 types of filaments- thin myosin and thick actin.
• B. Myosin filament forms the light band.
• C. The region where both actin and myosin are present is seen as dark band.
• D. Actin filament forms the dark band.

Answer 1

The correct option is C

The region where both actin and myosin are present is seen as dark band.

A myofibril is made up of 2 filamentous protein fibres called myofilaments, known as thin actin and thick myosin filaments. Myosin filaments and actin filaments are arranged alternately and cause striations. The region where both myofilaments (actin and myosin) are present is seen as dark and is called the dark band. The region where only actin filament is seen is light and is called the light band. A dark band and half of the two light bands seen on both its sides together constitute a sarcomere.