Multiple Choice
In skeletal muscle sarcomeres, which protein is the primary component of the thick filament?
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8. Protein Function
Skeletal Muscle Contraction
Multiple Choice
In skeletal muscle sarcomeres, which protein is the primary component of the thick filaments?
A
Tropomyosin
B
Actin
C
Troponin
D
Myosin (primarily myosin II)
Verified step by step guidance1
Understand the structure of skeletal muscle sarcomeres, which are composed of repeating units containing thick and thin filaments.
Recall that thick filaments are primarily made up of the motor protein myosin, specifically myosin II in skeletal muscle.
Recognize that actin is the main component of thin filaments, not thick filaments.
Note that tropomyosin and troponin are regulatory proteins associated with thin filaments, involved in muscle contraction regulation but not forming the thick filament itself.
Conclude that the primary protein component of thick filaments in skeletal muscle sarcomeres is myosin (primarily myosin II).
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