Multiple choice

Which of the following inhibits myosin-actin binding in relaxed muscles of the body?

  1. Troponin T

  2. Troponin C

  3. EF hand

  4. Troponin I

  5. Calmodulin

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Troponin binds to actin in thin myofilaments to hold the actin-tropomyosin complex in place. Because of it, myosin cannot bind actin in relaxed muscle.