Given below are two statements.
Statement I : H zone is the pale central region of the I-band.
Statement II : H-zone consists of only thin filaments.
In light of the above statements, choose the correct answer from the options given below.

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Statement I is correct but statement II is incorrect.

Statement I is incorrect but statement II is correct.

Both statement I and statement II are incorrect.

Both statement I and statement II are correct.

answer is B.

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Detailed Solution

Both statement I and statement II are incorrect.

The H zone is actually found within the A band of the sarcomere, not in the I band. The A band is the region where thick filaments (myosin) are present, and the H zone specifically is the central region of the A band where there are no overlapping thin filaments (actin) at rest.
The H zone consists of thick filaments (myosin), not thin filaments. It is the region where only myosin filaments are present and actin filaments do not overlap.

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