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List two differences between A - band an...

List two differences between A - band and I - band.

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**Step-by-Step Solution:** 1. **Definition of A-band and I-band:** - The A-band (anisotropic band) is a dark band in the sarcomere that contains both thick (myosin) and thin (actin) filaments. - The I-band (isotropic band) is a lighter band in the sarcomere that contains only thin (actin) filaments. 2. **Composition:** - The A-band is composed of both myosin (thick) and actin (thin) filaments. ...
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