Question

multiple choice question

elastic filaments in a myofibril are made of which protein?

• actin
• troponin
• tropomyosin
• titin

Explanation:

Identify the structural protein of elastic filaments

Elastic filaments in a myofibril are composed of a giant, springy protein called titin (also known as connectin).

Analyze the incorrect options

• Actin: The primary protein component of thin filaments.
• Troponin: A regulatory protein associated with thin filaments.
• Tropomyosin: Another regulatory protein that blocks myosin-binding sites on actin.

Answer:

• Actin
• Troponin
• Tropomyosin
• Titin (Correct answer)