Match Each Molecule with Its Description

question 2

Multiple Choice

Match each molecule with its description.
-tropomyosin

• A)molecules that form a twisted double helix that makes up most of the thin filaments
• B)neurotransmitters involved in muscle cell contraction
• C)molecules that block the crossbridge binding sites when the muscle is not contracting
• D)molecules that make up thick filaments
• E)molecules that bind to Ca²⁺, change their shape, and then uncover the crossbridge binding sites

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