Q140 / 180 · AIIMS 2014 · Zoology

Select the correct option regarding A, B and C Figure

  • A
    A-Tropomyosin-runs close to F-actin throughout its length
  • B
    B-Troponin-complex protein distributed at regular interval of tropomyosin
  • Correct answer
    C
    C-F actin - polymer of monomeric G-actin helically bound to each other
  • D
    None of these

Solution

A - Troponin B - Tropomyosin $C-F$-actin Two filaments of protein tropomyosin run close to F-actins throughout its length. A complex protein troponin is distributed at regular intervals on the tropomyosin. In the resting state, a subunit of troponin masks the active binding sites for myosin on the actin filaments.

Hence, the correct answer is option: 'C'.

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