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Questions and Answers
What is the composition of myosin?
What is the composition of myosin?
- 2 heavy chains, 4 light chains, and 1 alpha helix
- 1 heavy chain, 2 light chains, and 2 alpha helixes
- 2 heavy chains, 2 light chains, and 2 alpha helixes (correct)
- 4 heavy chains, 2 light chains, and 2 alpha helixes
What is the role of the amino terminus of myosin?
What is the role of the amino terminus of myosin?
- Contains the domain for ATP hydrolyzation (correct)
- Connects to actin filaments
- Is responsible for muscle contraction
- Forms the tail of the protein
What forms the thick filaments in muscle cells?
What forms the thick filaments in muscle cells?
- Aggregation of actin molecules
- Aggregation of troponin molecules
- Aggregation of myosin molecules (correct)
- Aggregation of alpha helixes
What forms the thin filaments in muscle cells?
What forms the thin filaments in muscle cells?
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Study Notes
Myosin Composition
- Myosin is a hexameric protein composed of two heavy chains and four light chains.
Role of Amino Terminus
- The amino terminus of myosin is the head region, which binds to actin and has ATPase activity.
Thick Filaments
- Thick filaments in muscle cells are formed by the assembly of myosin molecules.
Thin Filaments
- Thin filaments in muscle cells are formed by the assembly of actin molecules.
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Description
Test your knowledge of myosin protein structure and function in this quiz. Explore the composition of myosin, its role in cell transport and muscle contraction, and its subunit organization. Challenge your understanding of the amino and carboxyl terminus, heavy and light chains, and the supercoiled structure of this essential protein.
