Question
Biology Question on locomotion and movement
Sarcomere is the functional unit of contraction in a muscle fibre. Identify the portion of myofibril that constitute a sarcomere.
A
The portion of myofibril between two successive�M�line.
B
The portion of myofibril between two successive �I� band.
C
The portion of myofibril between two successive �A� band.
D
The portion of myofibril between two successive �Z� line.
Answer
The portion of myofibril between two successive �Z� line.
Explanation
Solution
The sarcomere comprises A-band and half of each adjacent I-band. Sarcomere is the functional unit of myofibril.