Question

What is sarcomere?

• A. Part between two H-lines
• B. Part between two A- lines
• C. Part between two I - bands
• D. Part between two z - lines

Answer 1

The correct option is D Part between two z - lines

A sarcomere is the basic unit of striated muscle tissue. It is the repeating unit between two Z lines.
H-Zone: a subdivision of the A-Band in the center of the sarcomere where only thick filaments are present.
The interaction between actin and myosin filaments in the A-band of the sarcomere is responsible for the muscle contraction.
The I band is that part of the sarcomere that contains thin filaments.