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Questions and Answers
Which proteins make up actin myofilaments?
Which proteins make up actin myofilaments?
- G actin, myosin, and troponin
- Actin, tropomyosin, and troponin
- Actin, myosin, and troponin
- G actin, tropomyosin, and troponin (correct)
What is the role of tropomyosin in a relaxed muscle?
What is the role of tropomyosin in a relaxed muscle?
- It covers the active sites on G actin subunits (correct)
- It prevents the binding of myosin myofilaments
- It binds Ca2+
- It anchors troponin to actin
How many subunits does troponin consist of?
How many subunits does troponin consist of?
- Four
- Five
- Two
- Three (correct)
What is the shape of myosin molecules in myosin myofilaments?
What is the shape of myosin molecules in myosin myofilaments?
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How many myosin molecules are there in myosin myofilaments?
How many myosin molecules are there in myosin myofilaments?
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Which proteins make up myosin myofilaments?
Which proteins make up myosin myofilaments?
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What is the role of troponin in muscle contraction?
What is the role of troponin in muscle contraction?
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What is the shape of myosin molecules in myosin myofilaments?
What is the shape of myosin molecules in myosin myofilaments?
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What covers the active sites on G actin subunits in a relaxed muscle?
What covers the active sites on G actin subunits in a relaxed muscle?
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What is the function of the myosin heads in myosin myofilaments?
What is the function of the myosin heads in myosin myofilaments?
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