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MMLU-Pro / 3271 / Which of the following statements concerning a sarcomere of a striated muscle…

Problem

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question

Which of the following statements concerning a sarcomere of a striated muscle (such as skeletal muscle) is correct?

category

biology

options

  1. The A band shortens during muscle contraction.
  2. During contraction H zones become elongated.
  3. The proteins troponin and tropomyosin constitute the thick and thin filaments, respectively.
  4. Myosin filaments are found in the I band.
  5. Troponin and tropomyosin are located in the H zone.
  6. Tropomyosin binds to myosin, blocking the actin-binding site.
  7. The thin filaments are composed entirely of myosin.
  8. In the relaxed position tropomyosin impedes myosin's access to the binding site of actin.

src

ori_mmlu-college_biology

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Official source

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