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STD 11 - 17. Locomotion and movement — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 17. Locomotion and movement1 Mark
MCQ
Actin filament is made up of
  • ✓
    Actin, troponin and tropomyosin
  • B
    Actin, troponin
  • C
    Myosin, troponin
  • D
    Actin, tropomyosin
✓

Answer

Correct option: A.
Actin, troponin and tropomyosin
a
(a) One thin filament probably contains $300-400$ actin molecules about $50$ tropomyosin and $50$ troponin.

It is said that tropomyosin plays a vital role in sensitizing the contractile proteins $(actin\  and\ myosin) $ to calcium ions.

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