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The thick filament of a muscle fibril is a polymer of
Aactin
Bmyosin
Ctroponin
Dtropomyosin
Answer & Solution
Correct answer: B. myosin
1. The two filament types are built from different proteins.
2. The thick filament is a polymerised protein called myosin.
3. Many monomeric proteins called meromyosins make it up.
4. Actin, troponin and tropomyosin all belong to the thin filament.
_Source: NCERT Class 11 Biology Ch17 'Locomotion and Movement'_
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