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________ of the sacromere remains unaffected during the muscle contraction.

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________ of the sacromere remains unaffected during the muscle contraction.

(a) H zone

(b) A band

(c) I band

(d) H band

The question was asked by my college professor while I was bunking the class.

My doubt stems from Cell Motility topic in section Cytoskeleton and Cell Motility of Cell Biology

1 Answer

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The correct option is (b) A band

To elaborate: The A band of sacromeres remains constant in length whereas H and I bands decrease in length and disappear altogether.

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