A sarcomere is the functional unit of contraction in a muscle fibre. Identify the portion of myofibril that constitutes a sarcomere.

Question

The portion of myofibril between two successive 'Z' lines.

The portion of myofibril between two successive 'I' bands.

The portion of myofibril between two successive 'A' bands.

The portion of myofibril between two successive 'M' lines.

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