Question

What is present in the centre of each ‘I’ band?

• A. ‘H’ line
• B. ‘A’ line
• C. ‘M’ line
• D. Z’ line

Answer 1

Answer:

D. Z’ line

• The ‘I’ band or the isotropic band is also known as the light band.

• It contains the protein actin.

• The ‘Z’ line is present in the centre of each ‘I’ band which bisects it.

• The ‘Z’ line is an elastic fibre.