Each thin filament consists ofQuestion 4Select one:a.a double strand of myosin molecules.b.two actin protein strands coiled helically around each other.c.six molecules coiled into a helical structure.d.a rod-shaped structure with "heads" projecting from each end.e.chains of myosin molecules.
Question
Each thin filament consists ofQuestion 4Select one:a.a double strand of myosin molecules.b.two actin protein strands coiled helically around each other.c.six molecules coiled into a helical structure.d.a rod-shaped structure with "heads" projecting from each end.e.chains of myosin molecules.
Solution
The correct answer is:
b. two actin protein strands coiled helically around each other.
Each thin filament in a muscle fiber is primarily composed of two strands of the protein actin. These strands are coiled around each other in a helical structure. The other options mentioned, such as myosin molecules and rod-shaped structures with "heads", are components of the thick filaments, not the thin filaments.
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