Question:
Regulatory proteins in a myofibril are:
Regulatory proteins in a myofibril are:
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Troponin binds calcium, and tropomyosin shifts to expose myosin-binding sites on actin for muscle contraction.
Updated On: Mar 6, 2026
- Actin and myosin
- Troponin and actin
- Troponin and tropomyosin
- Actin and tropomyosin
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The Correct Option is C
Solution and Explanation
Step 1: Understanding Myofibril Regulation
- Troponin and tropomyosin regulate muscle contraction by controlling actin-myosin interaction.
- Actin and myosin are contractile proteins, not regulatory proteins.
- Troponin and tropomyosin regulate muscle contraction by controlling actin-myosin interaction.
- Actin and myosin are contractile proteins, not regulatory proteins.
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