# Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction.? with Answer - Biology Mcqs | TestPrep

> Solved MCQ: Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction. Correct Answer: C. Tropomyosin gets removed from the binding sites of actin filaments.. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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# Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction.

Direct Answer & Quick Reference

The correct option is **C. Tropomyosin gets removed from the binding sites of actin filaments.**.

A. Binding sites of actin get attached to the myosin head.

B. Troponin uncovers the actin binding sites.

C. Tropomyosin gets removed from the binding sites of actin filaments. **(Correct Answer)**

D. Ca2+ goes back inside sarcoplasmic reticulum.

✨ Explain with AI

Verified Key: C. Tropomyosin gets removed from the binding sites of actin filaments.
Solved by 2,843+ students

Verified against official examination board answer keys and standard curriculum textbooks.

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*Source: https://test-prep.blog/mcq/which-of-the-following-step-occurs-immediately-after-binding-of-ca2-with-troponi-3637fa2c-8151-4360-8f88-c567bd3db222*
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