A thin filament of muscle is composed primarily of the protein:

Question

Quizplus · Accepted Answer

A thin filament of muscle is composed primarily of the protein actin. Myosin, on the other hand, is the primary component of thick filaments. Hemoglobin and myoglobin are both involved in the binding and transport of oxygen in blood and muscle, respectively, but are not components of muscle filaments. Pectin is a carbohydrate found in the cell walls of plants and is not involved in muscle physiology.

A Thin Filament of Muscle Is Composed Primarily of the Protein