Write four differences between A-band and I-band and draw a label… - Vidyadip

Question

Write four differences between A-band and I-band and draw a labelled diagram illustrating a transverse section of muscle showing muscle bundle and muscle fibres.

✓

Answer

Differences between A-band and I-band :

S. No.	A-band	I-Band
1.	It is made of myosin filaments.	It is made up of actin filaments only.
2.	It appears in a deep or dark color.	I-band appears in a lighter colour.
3.	In its centre, there is a light H-zone.	In its centre there is a dark Krauses membrane.
4.	It is an anisotropic band containing two types of proteins.	It is an isotropic band containing only one type of protein.

Labelled diagram illustrating a transverse section of muscle showing muscle bundle and muscle fibres :

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