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Locomotion and Movement — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYLocomotion and Movement3 Marks
Question
Describe the structure of an actin filament.
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Answer

  1. Each actin filament is made of two 'F' (filamentous) actins that are helically wound to each other.
  2. Each 'F' actin is a polymer of many 'G' (globular) actins.
  3. Two filaments of protein, tropomyosin also run close to the F-actins through out their length.
  4. Another complex protein, troponin, is distributed at regular intervals on the tropomyosin; a subunit of troponin masks the active/binding site for myosin on the actin filaments.

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