Question

76) G-Actin polymerizes to form F-Actin. 77) Thin filaments are composed exclusively of the protein Myosin. 78) Each thin filament consists of about 250 Myosin molecules 79) The power stroke is generated during the latent phase. 80) Reformation of cross bridges occurs during the contraction-relaxation phase. 81) Creatine phosphate (phosphocreatine) carries extra oxygen in slow oxidative fibers 82) Myosin gives fast oxidative fibers their characteristic color.
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Answer:

76. True

G actin is a globular protein which polymerises to form F actin which are long filaments. The polymerization takes place by ATP.

77. False.

Thin filaments are composed of actin. They also contain Troponin and tropomyosin.

78. False.

Each Thick filaments consists of about 250 myosin molecules.

79. False

The power stroke is generated during contraction phase.

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