Question

what is A band and I band on myofibril

Answer 1

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There are two types of myofibrils in the sarcomere called thin filaments and thick filaments. The thin filaments are made of protein called Actin and the thick filaments are made of proteins calledMyosin. The actin and myosin filaments in a sarcomere are arranged in a specific manner so that their overlapping and interlocking patterns produce distinct bands when they are observed under a microscope. These bands are technically called as A-bands (Anisotropic) and I-Bands (Isotropic).

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Answer 2

Answer:

Partially arranged filaments in the sarcoplasm are known as Myofibrils or Myofilaments. Myofibrils have 2 types of bands-

Explanation:

1. DARK BAND- it is known as A band or Anisotropic Band. It contains proteins namely- Myosin.

2. LIGHT BAND- it is known as I band or Isotropic band. It contains of proteins  namely - Actin.

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