Which Statement About the Molecular Arrangement of Actin and Myosin

question 129

Multiple Choice

Which statement about the molecular arrangement of actin and myosin in myofibrils is true?

• A) A thin filament consists of myosin and tropomyosin.
• B) Two chains of myosin monomers are twisted into a helix.
• C) Two strands of tropomyosin lie in the grooves of the myosin.
• D) Troponin forms the head of the myosin molecule.
• E) The myosin heads have ATPase activity and interact with the actin.

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The formal presentation of a document in a way that follows legal requirements or norms.

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An individual who signs a loan or credit application on behalf of another, promising to pay if the primary borrower fails to do so.

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A person who promises to pay a set sum to the holder of a promissory note or certificate of deposit.