Tropomyosin at rest

  1. forms the Z line
  2. hydrolyses ATP
  3. covers the myosin-binding sites on actin
  4. binds Ca²⁺
Answer

C) covers the myosin-binding sites on actin

It blocks cross-bridge formation. AS & A Level Biology · Topic 15 Control and Coordination · 15.1 Control and coordination in mammals

Biology MCQ · More A Level Biology: Control and coordination MCQs · Practise